/**** 
* Plugins
****/ 
var tween = LK.import("@upit/tween.v1");

/**** 
* Classes
****/ 
/** 
* Represents an allied archer that shoots arrows independently.
*/ 
var ArcherAlly = Container.expand(function () {
	var self = Container.call(this);
	// Create and attach the archer graphic asset
	var graphics = self.attachAsset('Archer', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// No rotation needed for 'Archer' asset as it's already upright and flipped
	self.fireTimer = 0; // Timer for shooting
	self.fireInterval = 180; // Shoot every 3 seconds (3 * 60 ticks)
	/** 
	* Update method called each game tick by the LK engine.
	* Handles firing logic.
	*/ 
	self.update = function () {
		self.fireTimer++;
		var effectiveFireInterval = Math.max(60, self.fireInterval * allyAttackSpeedMultiplier); // Apply ally attack speed upgrade
		if (self.fireTimer >= effectiveFireInterval) {
			self.fireTimer = 0; // Reset timer
			// Find the closest enemy to shoot at
			var closestEnemy = null;
			var closestDistance = Infinity;
			for (var i = 0; i < enemies.length; i++) {
				var enemy = enemies[i];
				// Calculate distance to the enemy
				var dx = enemy.x - self.x;
				var dy = enemy.y - self.y;
				var distance = Math.sqrt(dx * dx + dy * dy);
				if (distance < closestDistance) {
					closestDistance = distance;
					closestEnemy = enemy;
				}
			}
			// If an enemy is found, fire an arrow
			if (closestEnemy) {
				// Calculate angle towards the closest enemy
				var angle = Math.atan2(closestEnemy.x - self.x, -(closestEnemy.y - self.y));
				// Create a new arrow instance
				var newArrow = new Arrow(angle);
				// Apply multi-shot to allies if the upgrade is enabled for the player
				if (multiShotEnabled) {
					var angle2 = angle + Math.PI / 12; // Offset by 15 degrees
					var newArrow2 = new Arrow(angle2);
					newArrow2.x = self.x;
					newArrow2.y = self.y;
					newArrow2.lastY = newArrow2.y;
					newArrow2.lastX = newArrow2.x;
					game.addChild(newArrow2);
					arrows.push(newArrow2);
					var angle3 = angle - Math.PI / 12; // Offset by -15 degrees
					var newArrow3 = new Arrow(angle3);
					newArrow3.x = self.x;
					newArrow3.y = self.y;
					newArrow3.lastY = newArrow3.y;
					newArrow3.lastX = newArrow3.x;
					game.addChild(newArrow3);
					arrows.push(newArrow3);
				}
				newArrow.x = self.x;
				newArrow.y = self.y;
				// Ally arrows do not count towards the player's reload counter
				// The Arrow class handles piercing level based on player upgrade, but the ally doesn't benefit from player reload.
				// For simplicity, we'll let the ally benefit from player's piercing upgrade.
				newArrow.lastY = newArrow.y;
				newArrow.lastX = newArrow.x;
				// Add the arrow to the game scene and the tracking array.
				game.addChild(newArrow);
				arrows.push(newArrow); // Add to the same arrows array for collision detection
				// Ally doesn't play the 'shoot' sound
			}
		}
	};
	return self; // Return self for potential inheritance
});
// Sound when an enemy reaches the bastion
// No plugins needed for this version of the game.
/** 
* Represents an Arrow fired by the player.
* @param {number} angle - The angle in radians at which the arrow is fired.
*/ 
var Arrow = Container.expand(function (angle) {
	var self = Container.call(this);
	// Create and attach the arrow graphic asset
	var graphics = self.attachAsset('arrow', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	graphics.rotation = angle + Math.PI / 2; // Align arrow graphic with direction
	self.speed = 30; // Speed of the arrow in pixels per tick
	self.vx = Math.sin(angle) * self.speed; // Horizontal velocity component
	self.vy = -Math.cos(angle) * self.speed; // Vertical velocity component (negative Y is up)
	self.pierceLeft = arrowPierceLevel; // How many more enemies this arrow can pierce
	self.damage = arrowDamage; // Damage dealt by this arrow
	self.isPoison = poisonShotsEnabled; // Flag if this arrow applies poison
	self.targetEnemy = null; // Potential target for aimbot
	self.seekSpeed = 0.1; // How quickly the arrow adjusts its direction to seek
	if (aimbotEnabled) {
		// Find the closest enemy to seek if aimbot is enabled
		var closestEnemy = null;
		var closestDistance = Infinity;
		for (var i = 0; i < enemies.length; i++) {
			var enemy = enemies[i];
			var dx = enemy.x - self.x;
			var dy = enemy.y - self.y;
			var distance = Math.sqrt(dx * dx + dy * dy);
			if (distance < closestDistance) {
				closestDistance = distance;
				closestEnemy = enemy;
			}
		}
		if (closestEnemy) {
			self.targetEnemy = closestEnemy;
		}
	}
	/** 
	* Update method called each game tick by the LK engine.
	* Moves the arrow based on its velocity.
	*/ 
	self.update = function () {
		if (aimbotEnabled && self.targetEnemy && self.targetEnemy.parent) {
			// If aimbot is enabled, a target exists and is still in the game, seek it
			var targetAngle = Math.atan2(self.targetEnemy.x - self.x, -(self.targetEnemy.y - self.y));
			// Smoothly adjust the arrow's angle towards the target angle
			var angleDiff = targetAngle - (self.rotation - Math.PI / 2); // Difference considering graphic rotation
			// Normalize angle difference to be between -PI and PI
			if (angleDiff > Math.PI) {
				angleDiff -= 2 * Math.PI;
			}
			if (angleDiff < -Math.PI) {
				angleDiff += 2 * Math.PI;
			}
			// Interpolate angle
			var newAngle = self.rotation - Math.PI / 2 + angleDiff * self.seekSpeed;
			self.rotation = newAngle + Math.PI / 2;
			self.vx = Math.sin(newAngle) * self.speed;
			self.vy = -Math.cos(newAngle) * self.speed;
		} else if (aimbotEnabled && (!self.targetEnemy || !self.targetEnemy.parent)) {
			// If aimbot is enabled but current target is gone, find a new target
			self.targetEnemy = null; // Clear old target
			var closestEnemy = null;
			var closestDistance = Infinity;
			for (var i = 0; i < enemies.length; i++) {
				var enemy = enemies[i];
				var dx = enemy.x - self.x;
				var dy = enemy.y - self.y;
				var distance = Math.sqrt(dx * dx + dy * dy);
				if (distance < closestDistance) {
					closestDistance = distance;
					closestEnemy = enemy;
				}
			}
			if (closestEnemy) {
				self.targetEnemy = closestEnemy;
			}
		}
		self.x += self.vx;
		self.y += self.vy;
	};
	return self; // Return self for potential inheritance
});
/** 
	* Represents a Cannon ally that targets the strongest enemy.
	*/ 
var Cannon = Container.expand(function () {
	var self = Container.call(this);
	// Create and attach the cannon graphic asset (need to add a new asset for this)
	// For now, using a placeholder asset, will need a 'cannon_asset'
	var graphics = self.attachAsset('cannon_asset', {
		// Use actual cannon asset
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.attackRange = 800; // Long attack range
	self.attackDamage = 10; // High damage
	self.attackInterval = 300; // Attack every 5 seconds (300 ticks)
	self.attackTimer = 0; // Timer for attacks
	self.rotation = 0; // For aiming visual if implemented later
	/** 
	* Update method called each game tick by the LK engine.
	* Handles attacking the strongest enemy.
	*/ 
	self.update = function () {
		self.attackTimer++;
		var effectiveAttackInterval = Math.max(60, self.attackInterval * allyAttackSpeedMultiplier); // Apply ally attack speed upgrade
		if (self.attackTimer >= effectiveAttackInterval) {
			self.attackTimer = 0; // Reset timer
			// Find the strongest enemy (highest health)
			var strongestEnemy = null;
			var maxHealth = -1;
			for (var i = 0; i < enemies.length; i++) {
				var enemy = enemies[i];
				if (enemy.health > maxHealth) {
					maxHealth = enemy.health;
					strongestEnemy = enemy;
				}
			}
			// If a strongest enemy is found within range, attack it
			if (strongestEnemy) {
				// Calculate angle towards the strongest enemy
				var angle = Math.atan2(strongestEnemy.x - self.x, -(strongestEnemy.y - self.y));
				// Create a new cannonball instance
				var newCannonball = new Cannonball(angle);
				// Position the cannonball at the cannon's location
				newCannonball.x = self.x;
				newCannonball.y = self.y;
				newCannonball.lastY = newCannonball.y; // Initialize lastY for state tracking
				newCannonball.lastX = newCannonball.x; // Initialize lastX for state tracking
				// Add the cannonball to the game scene and the tracking array.
				game.addChild(newCannonball);
				cannonballs.push(newCannonball); // Add to the new cannonballs array
				// Optional: Add a visual/sound effect for cannon shot here later
			}
		}
	};
	return self; // Return self for potential inheritance
});
/** 
	* Represents a Cannonball fired by a Cannon.
	* @param {number} angle - The angle in radians at which the cannonball is fired.
	*/ 
var Cannonball = Container.expand(function (angle) {
	var self = Container.call(this);
	// Create and attach the cannonball graphic asset
	var graphics = self.attachAsset('cannonball', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	graphics.rotation = angle + Math.PI / 2; // Align cannonball graphic with direction
	self.speed = 20; // Base speed of the cannonball
	self.damage = 10; // Base damage dealt by this cannonball
	// Apply refined projectiles bonus if enabled
	if (refinedProjectilesEnabled) {
		self.speed += 5;
		self.damage += 5;
	}
	self.vx = Math.sin(angle) * self.speed; // Horizontal velocity component
	self.vy = -Math.cos(angle) * self.speed; // Vertical velocity component (negative Y is up)
	/** 
	* Update method called each game tick by the LK engine.
	* Moves the cannonball based on its velocity.
	*/ 
	self.update = function () {
		self.x += self.vx;
		self.y += self.vy;
	};
	return self; // Return self for potential inheritance
});
/** 
	* Represents an Enemy attacker moving towards the bastion.
	* @param {string} type - The type of enemy ('swordsman', 'knight', 'thief', 'boss', 'shield', 'wizard', 'elite_knight').
* @param {number} speed - The final calculated speed of the enemy.
* @param {number} health - The initial and maximum health of the enemy.
* @param {number} dodgeChance - The chance (0 to 1) for the enemy to dodge an attack.
*/ 
var Enemy = Container.expand(function (type, speed, health, dodgeChance) {
	var self = Container.call(this);
	// Set asset based on type
	var assetId = 'enemy'; // Default swordsman asset
	if (type === 'knight') {
		assetId = 'knight';
	} else if (type === 'elite_knight') {
		assetId = 'elite_knight_asset'; // Use specific asset for elite knight
	} else if (type === 'thief') {
		assetId = 'thief';
	} else if (type === 'boss') {
		assetId = 'boss';
	} else if (type === 'shield') {
		assetId = 'shield_enemy'; // Use specific asset for shield
	} else if (type === 'wizard') {
		assetId = 'wizard_enemy'; // Use specific asset for wizard
	} else if (type === 'spearman') {
		assetId = 'spearman'; // Use specific asset for spearman
	} else if (type === 'war_elephant') {
		assetId = 'war_elephant'; // Use specific asset for war elephant
	} else if (type === 'elite_shield') {
		assetId = 'elite_shield_asset'; // Use specific asset for elite shield
	} else if (type === 'shaman') {
		assetId = 'shaman_enemy'; // Use specific asset for shaman
	} else if (type === 'hot_air_balloon') {
		assetId = 'hot_air_balloon_asset'; // Use specific asset for hot air balloon
	} else if (type === 'dark_bowman') {
		assetId = 'dark_bowman_asset'; // Use specific asset for dark bowman
	}
	var graphics = self.attachAsset(assetId, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.type = type; // 'swordsman', 'knight', 'thief', 'boss', 'shield', 'wizard', 'elite_knight', 'shaman', etc.
	self.speed = speed; // Final calculated speed
	self.health = health;
	self.maxHealth = health; // Store max health for visual feedback
	self.dodgeChance = dodgeChance || 0; // Default to 0 if undefined
	self.poisonStacks = 0; // Number of poison stacks
	self.poisonTimer = 0; // Timer for poison damage
	self.poisonDamagePerTick = 0.05; // Damage per tick per stack
	self.slowTimer = 0; // Timer for slowdown effect
	self.currentSlowAmount = 1.0; // Multiplier for current slowdown effect (1.0 means no slow)
	// Initialize shaman-specific properties
	if (type === 'shaman') {
		self.shamanTimer = 0;
	}
	// Set tag property based on type
	self.tag = null; // Default tag is null
	if (self.type === 'wizard' || self.type === 'spearman' || self.type === 'war_elephant' || self.type === 'shaman') {
		self.tag = 'Green';
	} else if (self.type === 'dark_bowman') {
		self.tag = 'Black'; // Black-tagged enemies are immune to arrows
	}
	// Wizard-specific properties
	if (self.type === 'wizard') {
		self.teleportTimer = 0;
		self.teleportInterval = 180; // 3 seconds * 60 FPS
	}
	// --- Public Methods (defined before use) ---
	/** 
	* Update method called each game tick by the LK engine.
	* Moves the enemy downwards (or teleports for wizard) and updates visual feedback.
	*/ 
	self.update = function () {
		if (self.type === 'wizard') {
			self.teleportTimer = (self.teleportTimer || 0) + 1; // Initialize timer if needed
			if (self.teleportTimer >= self.teleportInterval) {
				self.teleportTimer = 0;
				// Teleport logic: Random X, slightly advanced Y
				var oldY = self.y;
				var teleportPadding = graphics.width / 2 + 20; // Use actual graphic width
				var newX = teleportPadding + Math.random() * (GAME_WIDTH - 2 * teleportPadding);
				// Advance Y slightly, but don't teleport past bastion
				var newY = Math.min(BASTION_Y - graphics.height, self.y + 100 + Math.random() * 100); // Advance 100-200px
				// Ensure not teleporting backwards significantly or offscreen top
				newY = Math.max(graphics.height / 2, newY);
				self.x = newX;
				self.y = newY;
				self.lastY = oldY; // Set lastY to pre-teleport position to avoid false bastion triggers
				// Add a visual effect for teleport
				LK.effects.flashObject(self, 0xAA00FF, 300); // Purple flash
			} else {
				// Move normally if not teleporting this frame
				self.y += self.speed;
			}
		} else {
			// Normal movement for other enemy types
			self.y += self.speed * self.currentSlowAmount; // Apply slowdown to movement
		}
		// Decrease slowdown timer and reset slow amount if timer runs out
		if (self.slowTimer > 0) {
			self.slowTimer--;
			if (self.slowTimer <= 0) {
				self.currentSlowAmount = 1.0; // Reset speed multiplier when slowdown ends
				// Optional: Remove visual feedback for slowdown here later
			}
		}
		// Apply poison damage if stacks exist
		if (self.poisonStacks > 0) {
			self.poisonTimer++;
			if (self.poisonTimer >= 30) {
				// Apply poison damage every 0.5 seconds (30 ticks)
				self.poisonTimer = 0;
				var poisonDmg = self.poisonStacks * self.poisonDamagePerTick * 30; // Damage per 0.5s
				self.health -= poisonDmg;
				// Optional: Add visual feedback for poison damage here later
			}
			// Check if health dropped to zero or below due to poison
			if (self.health <= 0 && self.parent) {
				// Ensure enemy is still in the game
				// Enemy defeated by poison
				LK.setScore(LK.getScore() + 1); // Increment score.
				scoreTxt.setText(LK.getScore()); // Update score display.
				// Destroy the enemy
				self.destroy();
				// The main game update loop needs to handle removing the enemy from the `enemies` array
				return; // Stop updating this destroyed instance
			}
		}
		// Visual feedback based on health - alpha fade (applies to all types)
		var healthRatio = self.maxHealth > 0 ? self.health / self.maxHealth : 0;
		graphics.alpha = 0.4 + healthRatio * 0.6; // Fade from 1.0 down to 0.4
		// Shaman ability: reduce player ammo periodically
		if (self.type === 'shaman') {
			if (self.shamanTimer === undefined) {
				self.shamanTimer = 0;
			}
			self.shamanTimer += 1;
			var shamanAbilityInterval = 300; // 5 seconds * 60 FPS
			if (self.shamanTimer >= shamanAbilityInterval) {
				self.shamanTimer = 0;
				// Reduce player ammo, but not below 0
				arrowsFired = Math.min(maxArrowsBeforeCooldown, arrowsFired + 1); // Make it require one more shot for reload
				ammoTxt.setText('Ammo: ' + (maxArrowsBeforeCooldown - arrowsFired));
				// Optional: Add a visual/sound effect for shaman ability
			}
		}
	}; //{N} // Adjusted line identifier
	/** 
	* Method called when the enemy is hit by an arrow.
	* Handles dodging and health reduction.
	* @param {number} damage - The amount of damage the arrow deals.
	* @returns {boolean} - True if the enemy is defeated, false otherwise.
	*/ 
	self.takeDamage = function (damage) {
		var source = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : null;
		// Add source parameter, default to null
		// Check for dodge first (only if dodgeChance is positive)
		if (self.dodgeChance > 0 && Math.random() < self.dodgeChance) {
			// Optional: Add a visual effect for dodge here later
			// console.log(self.type + " dodged!");
			return false; // Dodged, so not defeated by this hit
		}
		// Check if enemy is Black-tagged and source is an Arrow
		if (self.tag === 'Black' && source instanceof Arrow) {
			// Black-tagged enemies are immune to arrow projectiles
			return false; // Not defeated, arrow has no effect
		}
		self.health -= damage;
		// Check if the damage source was a poison arrow and apply poison stacks
		if (source && source.isPoison) {
			// Use the 'source' parameter
			self.poisonStacks++; // Increase poison stacks
			self.poisonTimer = 0; // Reset timer to apply damage immediately
		}
		// Check if the damage source was a Magic Ball and apply slowdown
		if (source && source instanceof MagicBall) {
			self.slowTimer = source.slowDuration; // Apply slowdown duration
			self.currentSlowAmount = source.slowAmount; // Apply slowdown amount
			// Optional: Add visual feedback for slowdown here later
		}
		// Check if the damage source should apply Green Slowdown
		if (greenSlowdownEnabled && self.tag === 'Green' && self.slowTimer <= 0) {
			// Apply Green Slowdown only if the upgrade is active, enemy is Green, and not already slowed
			self.slowTimer = 10 * 60; // 10 seconds * 60 ticks/sec
			self.currentSlowAmount = 0.9; // 10% slowdown
			// Optional: Add visual feedback for green slowdown
		}
		// Check if enemy was defeated by this damage
		var defeated = self.health <= 0;
		if (defeated && self.type === 'war_elephant') {
			// If War Elephant is defeated, spawn 5 spearmen
			for (var i = 0; i < 5; i++) {
				var spawnPadding = 100; // Padding from edge
				var spawnX = self.x + (Math.random() * 200 - 100); // Spawn around elephant's x
				var spawnY = self.y + (Math.random() * 100 - 50); // Spawn around elephant's y, slightly forward
				// Ensure spawns are within game bounds
				spawnX = Math.max(spawnPadding, Math.min(GAME_WIDTH - spawnPadding, spawnX));
				spawnY = Math.max(spawnPadding, Math.min(BASTION_Y - 50, spawnY)); // Don't spawn too close to bastion
				var newSpearman = new Enemy('spearman', currentEnemySpeed * enemySpeedMultiplier, 10, 0); // Base spearman stats
				newSpearman.x = spawnX;
				newSpearman.y = spawnY;
				newSpearman.lastY = newSpearman.y;
				game.addChild(newSpearman);
				enemies.push(newSpearman);
			}
		} else if (defeated && self.type === 'hot_air_balloon') {
			// If Hot Air Balloon is defeated, spawn 5 random non-green enemies
			var possibleTypes = ['swordsman', 'knight', 'thief', 'shield', 'elite_knight', 'elite_shield', 'dark_bowman'];
			for (var i = 0; i < 5; i++) {
				// Choose random enemy type that is not green-tagged
				var randomType = possibleTypes[Math.floor(Math.random() * possibleTypes.length)];
				var randomHP = 1 + Math.floor(Math.random() * 5); // Random HP between 1-5
				var randomSpeed = currentEnemySpeed * 0.7 * enemySpeedMultiplier; // Slower than average
				var newEnemy = new Enemy(randomType, randomSpeed, randomHP, 0);
				// Spawn in a staggered pattern below the balloon
				var spawnPadding = 100;
				var spawnX = self.x + (Math.random() * 300 - 150); // Wider spread than elephant
				var spawnY = self.y + Math.random() * 200; // Always below the balloon
				// Ensure spawns are within game bounds
				spawnX = Math.max(spawnPadding, Math.min(GAME_WIDTH - spawnPadding, spawnX));
				spawnY = Math.min(BASTION_Y - 50, spawnY); // Don't spawn too close to bastion
				newEnemy.x = spawnX;
				newEnemy.y = spawnY;
				newEnemy.lastY = newEnemy.y;
				game.addChild(newEnemy);
				enemies.push(newEnemy);
			}
		}
		// No need to update alpha here, self.update handles it
		return defeated; // Return true if health is 0 or less
	}; //{O} // Adjusted line identifier
	// --- Initialization ---
	// Apply visual distinctions based on type
	graphics.tint = 0xFFFFFF; // Reset tint
	graphics.scale.set(1.0); // Reset scale
	if (self.type === 'knight') {
		graphics.tint = 0xCCCCCC; // Grey tint for Knights
		graphics.scale.set(1.1);
	} else if (self.type === 'elite_knight') {
		graphics.tint = 0xFFD700; // Gold tint for Elite Knights
		graphics.scale.set(1.2); // Slightly larger than normal knight
	} else if (self.type === 'thief') {
		graphics.tint = 0xCCFFCC; // Pale Green tint for Thieves
		graphics.scale.set(0.9);
	} else if (self.type === 'boss') {
		graphics.tint = 0xFFCCCC; // Pale Red tint for Bosses
		graphics.scale.set(1.4); // Make bosses quite large
	} else if (self.type === 'shield') {
		graphics.tint = 0xADD8E6; // Light Blue tint for Shield
		graphics.scale.set(1.2); // Make shield enemies bulky
	} else if (self.type === 'wizard') {
		graphics.tint = 0xE0B0FF; // Light Purple tint for Wizard
		graphics.scale.set(1.0);
	} else if (self.type === 'elite_shield') {
		graphics.tint = 0x8A2BE2; // Blue Violet tint for Elite Shield
		graphics.scale.set(1.3); // Slightly larger than normal shield
	} //{11} // Modified original line identifier location
	return self; // Return self for potential inheritance
});
var EnemypediaScreen = Container.expand(function () {
	var self = Container.call(this);
	self.currentPage = 0;
	self.totalPages = enemyPediaData.length;
	// Background
	var bgAssetHeight = LK.getAsset('pedia_screen_bg', {}).height; // Get actual asset height for calculations
	var bgAssetWidth = LK.getAsset('pedia_screen_bg', {}).width; // Get actual asset width
	var bg = self.attachAsset('pedia_screen_bg', {
		anchorX: 0.5,
		anchorY: 0.5
		// width and height are from asset default
	});
	self.x = GAME_WIDTH / 2;
	self.y = GAME_HEIGHT / 2;
	// Title
	var titleText = new Text2('Enemypedia', {
		size: 90,
		fill: 0xFFFFFF
	});
	titleText.anchor.set(0.5, 0.5);
	titleText.x = 0;
	titleText.y = -(bgAssetHeight / 2) + 70; // Positioned from top of BG
	self.addChild(titleText);
	// Content container for enemy details
	self.contentContainer = new Container();
	// Position content container centrally between title and nav buttons
	self.contentContainer.x = 0; // Centered horizontally
	self.contentContainer.y = titleText.y + titleText.height / 2 + 20; // Below title
	self.addChild(self.contentContainer);
	// Navigation and Close Buttons
	var navButtonYPos = bgAssetHeight / 2 - 60; // Positioned from bottom of BG
	var closeButton = new Container();
	var closeButtonBg = closeButton.attachAsset('pedia_nav_button_bg', {
		anchorX: 0.5,
		anchorY: 0.5,
		color: 0xAA4444
	});
	var closeButtonText = new Text2('Close', {
		size: 40,
		fill: 0xFFFFFF
	});
	closeButtonText.anchor.set(0.5, 0.5);
	closeButton.addChild(closeButtonText);
	closeButton.x = 0;
	closeButton.y = navButtonYPos;
	closeButton.interactive = true;
	closeButton.down = function () {
		hideEnemypediaScreen();
	};
	self.addChild(closeButton);
	var prevButton = new Container();
	var prevButtonBg = prevButton.attachAsset('pedia_nav_button_bg', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var prevButtonText = new Text2('Previous', {
		size: 40,
		fill: 0xFFFFFF
	});
	prevButtonText.anchor.set(0.5, 0.5);
	prevButton.addChild(prevButtonText);
	prevButton.x = -(closeButtonBg.width / 2 + prevButtonBg.width / 2 + 20); // Place left of close
	prevButton.y = navButtonYPos;
	prevButton.interactive = true;
	prevButton.down = function () {
		self.changePage(-1);
	};
	self.addChild(prevButton);
	var nextButton = new Container();
	var nextButtonBg = nextButton.attachAsset('pedia_nav_button_bg', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var nextButtonText = new Text2('Next', {
		size: 40,
		fill: 0xFFFFFF
	});
	nextButtonText.anchor.set(0.5, 0.5);
	nextButton.addChild(nextButtonText);
	nextButton.x = closeButtonBg.width / 2 + nextButtonBg.width / 2 + 20; // Place right of close
	nextButton.y = navButtonYPos;
	nextButton.interactive = true;
	nextButton.down = function () {
		self.changePage(1);
	};
	self.addChild(nextButton);
	self.pageNumberText = new Text2('', {
		size: 30,
		fill: 0xCCCCCC
	});
	self.pageNumberText.anchor.set(0.5, 0.5);
	self.pageNumberText.x = 0;
	self.pageNumberText.y = navButtonYPos - prevButtonBg.height / 2 - 25; // Above nav buttons
	self.addChild(self.pageNumberText);
	self.changePage = function (direction) {
		if (self.totalPages === 0) return;
		self.currentPage += direction;
		if (self.currentPage < 0) self.currentPage = self.totalPages - 1;
		if (self.currentPage >= self.totalPages) self.currentPage = 0;
		self.renderPage();
	};
	self.renderPage = function () {
		self.contentContainer.removeChildren();
		if (self.totalPages === 0) {
			var noDataText = new Text2('No enemy data available.', {
				size: 50,
				fill: 0xFFFFFF
			});
			noDataText.anchor.set(0.5, 0.5);
			self.contentContainer.addChild(noDataText);
			self.pageNumberText.setText('');
			prevButton.visible = false;
			nextButton.visible = false;
			return;
		}
		prevButton.visible = true;
		nextButton.visible = true;
		var enemy = enemyPediaData[self.currentPage];
		if (!enemy) return;
		self.pageNumberText.setText('Page ' + (self.currentPage + 1) + ' of ' + self.totalPages);
		var contentCurrentY = -(bgAssetHeight / 2) * 0.45; // Start Y for content, relative to contentContainer's center
		var enemyImage = LK.getAsset(enemy.assetId, {
			anchorX: 0.5,
			anchorY: 0.5
		});
		var maxImgSize = 280;
		var imgScale = 1;
		if (enemyImage.width > maxImgSize || enemyImage.height > maxImgSize) {
			imgScale = Math.min(maxImgSize / enemyImage.width, maxImgSize / enemyImage.height);
		}
		enemyImage.scale.set(imgScale);
		enemyImage.x = 0; // Centered horizontally in contentContainer for now
		enemyImage.y = contentCurrentY + enemyImage.height * imgScale / 2;
		self.contentContainer.addChild(enemyImage);
		contentCurrentY = enemyImage.y + enemyImage.height * imgScale / 2 + 30;
		var nameText = new Text2(enemy.name, {
			size: 60,
			fill: 0xFFD700,
			align: 'center',
			wordWrap: true,
			wordWrapWidth: bgAssetWidth * 0.8
		});
		nameText.anchor.set(0.5, 0);
		nameText.x = 0;
		nameText.y = contentCurrentY;
		self.contentContainer.addChild(nameText);
		contentCurrentY += nameText.height + 20;
		var descText = new Text2(enemy.description, {
			size: 38,
			fill: 0xCCCCCC,
			align: 'center',
			style: {
				wordWrap: true,
				wordWrapWidth: bgAssetWidth * 0.75,
				leading: 5
			}
		});
		descText.anchor.set(0.5, 0);
		descText.x = 0;
		descText.y = contentCurrentY;
		self.contentContainer.addChild(descText);
		contentCurrentY += descText.height + 30;
		var statsTitle = new Text2("Stats & Abilities:", {
			size: 40,
			fill: 0xDDDDFF,
			align: 'center'
		});
		statsTitle.anchor.set(0.5, 0);
		statsTitle.x = 0;
		statsTitle.y = contentCurrentY;
		self.contentContainer.addChild(statsTitle);
		contentCurrentY += statsTitle.height + 15;
		for (var i = 0; i < enemy.stats.length; i++) {
			var statText = new Text2('- ' + enemy.stats[i], {
				size: 32,
				fill: 0xBBBBBB,
				style: {
					wordWrap: true,
					wordWrapWidth: bgAssetWidth * 0.7,
					leading: 5
				}
			});
			statText.anchor.set(0.5, 0); // Center align stats text
			statText.x = 0;
			statText.y = contentCurrentY;
			self.contentContainer.addChild(statText);
			contentCurrentY += statText.height + 5; // Reduced spacing for stat lines
		}
		if (enemy.tags && enemy.tags.length > 0) {
			contentCurrentY += 15; // Extra space before tags
			var tagsText = new Text2('Tags: ' + enemy.tags.join(', '), {
				size: 32,
				fill: 0xAAAAFF,
				align: 'center',
				style: {
					wordWrap: true,
					wordWrapWidth: bgAssetWidth * 0.7
				}
			});
			tagsText.anchor.set(0.5, 0);
			tagsText.x = 0;
			tagsText.y = contentCurrentY;
			self.contentContainer.addChild(tagsText);
		}
	};
	self.renderPage();
	return self;
});
/** 
	* Represents a Magic Ball projectile fired by a Wizard Tower.
	* @param {number} angle - The angle in radians at which the magic ball is fired.
	*/ 
var MagicBall = Container.expand(function (angle) {
	var self = Container.call(this);
	// Create and attach the magic ball graphic asset
	var graphics = self.attachAsset('magic_ball_asset', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	graphics.rotation = angle + Math.PI / 2; // Align magic ball graphic with direction
	self.speed = 15; // Base speed of the magic ball
	self.damage = 2; // Base damage dealt by this magic ball
	// Apply refined projectiles bonus if enabled
	if (refinedProjectilesEnabled) {
		self.speed += 5;
		self.damage += 5;
	}
	self.vx = Math.sin(angle) * self.speed; // Horizontal velocity component
	self.vy = -Math.cos(angle) * self.speed; // Vertical velocity component (negative Y is up)
	self.slowDuration = 0; // Duration of slowdown applied on hit
	self.slowAmount = 0; // Multiplier for enemy speed on hit
	self.targetEnemy = null; // Track the specific enemy the magic ball is seeking
	self.seekSpeed = 0.05; // How quickly the magic ball adjusts its direction to seek
	/** 
	* Update method called each game tick by the LK engine.
	* Moves the magic ball based on its velocity and seeks target if Aimbot is enabled.
	*/ 
	self.update = function () {
		if (aimbotEnabled && self.targetEnemy && self.targetEnemy.parent) {
			// If aimbot is enabled, a target exists and is still in the game, seek it
			var targetAngle = Math.atan2(self.targetEnemy.x - self.x, -(self.targetEnemy.y - self.y));
			// Smoothly adjust the magic ball's angle towards the target angle
			var angleDiff = targetAngle - (self.rotation - Math.PI / 2); // Difference considering graphic rotation
			// Normalize angle difference to be between -PI and PI
			if (angleDiff > Math.PI) {
				angleDiff -= 2 * Math.PI;
			}
			if (angleDiff < -Math.PI) {
				angleDiff += 2 * Math.PI;
			}
			// Interpolate angle
			var newAngle = self.rotation - Math.PI / 2 + angleDiff * self.seekSpeed;
			self.rotation = newAngle + Math.PI / 2;
			self.vx = Math.sin(newAngle) * self.speed;
			self.vy = -Math.cos(newAngle) * self.speed;
		} else if (aimbotEnabled && (!self.targetEnemy || !self.targetEnemy.parent)) {
			// If aimbot is enabled but current target is gone, find a new target
			self.targetEnemy = null; // Clear old target
			var closestEnemy = null;
			var closestDistance = Infinity;
			for (var i = 0; i < enemies.length; i++) {
				var enemy = enemies[i];
				var dx = enemy.x - self.x;
				var dy = enemy.y - self.y;
				var distance = Math.sqrt(dx * dx + dy * dy);
				if (distance < closestDistance) {
					closestDistance = distance;
					closestEnemy = enemy;
				}
			}
			if (closestEnemy) {
				self.targetEnemy = closestEnemy;
			}
		}
		self.x += self.vx;
		self.y += self.vy;
	};
	return self; // Return self for potential inheritance
});
/** 
* Represents a Swordsman ally that attacks enemies in melee range.
*/ 
var Swordsman = Container.expand(function () {
	var self = Container.call(this);
	// Create and attach the swordsman graphic asset (reusing enemy asset for simplicity)
	var graphics = self.attachAsset('swordsmanAlly', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// No tint needed as ally asset has unique colors
	graphics.scale.set(1.0); // Use the asset's intended scale
	self.attackRange = 150; // Melee attack range
	self.attackDamage = 1; // Damage per hit
	self.attackInterval = 60; // Attack every 1 second (60 ticks)
	self.attackTimer = 0; // Timer for attacks
	self.lifetime = 10 * 60; // Lifetime in ticks (10 seconds * 60 ticks/sec)
	self.lifetimeTimer = 0; // Timer for lifetime
	/** 
	* Update method called each game tick by the LK engine.
	* Handles attacking and lifetime.
	*/ 
	self.update = function () {
		self.attackTimer++;
		self.lifetimeTimer++;
		// Check for lifetime
		var effectiveAttackInterval = Math.max(30, self.attackInterval * allyAttackSpeedMultiplier); // Apply ally attack speed upgrade, min 0.5s
		if (self.lifetimeTimer >= self.lifetime) {
			self.destroy();
			// Remove from the swordsmen array in the main game loop
			return; // Stop updating this instance
		}
		// Find the closest enemy to chase or attack
		var closestEnemy = null;
		var closestDistance = Infinity;
		for (var i = 0; i < enemies.length; i++) {
			var enemy = enemies[i];
			// Calculate distance to the enemy
			var dx = enemy.x - self.x;
			var dy = enemy.y - self.y;
			var distance = Math.sqrt(dx * dx + dy * dy);
			if (distance < closestDistance) {
				closestDistance = distance;
				closestEnemy = enemy;
			}
		}
		// If an enemy exists, chase it or attack if within range
		if (closestEnemy) {
			// Movement speed toward enemies
			var moveSpeed = 5;
			// If not within attack range, move toward the enemy
			if (closestDistance > self.attackRange) {
				// Calculate direction vector to enemy
				var dirX = closestEnemy.x - self.x;
				var dirY = closestEnemy.y - self.y;
				// Normalize the direction vector
				var length = Math.sqrt(dirX * dirX + dirY * dirY);
				dirX = dirX / length;
				dirY = dirY / length;
				// Move toward the enemy
				self.x += dirX * moveSpeed;
				self.y += dirY * moveSpeed;
			}
			// If within attack range and attack timer is ready, attack
			else if (self.attackTimer >= effectiveAttackInterval) {
				self.attackTimer = 0; // Reset timer
				// Apply damage to the enemy and check if it was defeated
				var enemyDefeated = closestEnemy.takeDamage(self.attackDamage, self); // Pass the swordsman as source
				if (enemyDefeated) {
					LK.setScore(LK.getScore() + 1); // Increment score when enemy is defeated by swordsman.
					scoreTxt.setText(LK.getScore()); // Update score display.
					// Destroy the enemy
					closestEnemy.destroy();
					// Remove from the enemies array in the main game loop
				}
				// Optional: Add a visual/sound effect for attack here later
			}
		}
	};
	return self; // Return self for potential inheritance
});
/** 
* Represents a Viking ally that throws piercing axes.
*/ 
var VikingAlly = Container.expand(function () {
	var self = Container.call(this);
	var graphics = self.attachAsset('viking_ally', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.attackRange = Infinity; // Infinite attack range
	self.attackInterval = 150; // Attack every 2.5 seconds (150 ticks)
	self.attackTimer = 0; // Timer for attacks
	/** 
	* Update method called each game tick by the LK engine.
	* Handles finding targets and throwing axes.
	*/ 
	self.update = function () {
		self.attackTimer++;
		var effectiveAttackInterval = Math.max(60, self.attackInterval * allyAttackSpeedMultiplier); // Apply ally attack speed upgrade
		if (self.attackTimer >= effectiveAttackInterval) {
			self.attackTimer = 0; // Reset timer
			// Find the closest enemy within range
			var closestEnemy = null;
			var closestDistance = self.attackRange;
			for (var i = 0; i < enemies.length; i++) {
				var enemy = enemies[i];
				var dx = enemy.x - self.x;
				var dy = enemy.y - self.y;
				var distance = Math.sqrt(dx * dx + dy * dy);
				if (distance < closestDistance) {
					closestDistance = distance;
					closestEnemy = enemy;
				}
			}
			// If an enemy is found, throw an axe
			if (closestEnemy) {
				var angle = Math.atan2(closestEnemy.x - self.x, -(closestEnemy.y - self.y));
				var newAxe = new VikingAxe(angle);
				newAxe.x = self.x;
				newAxe.y = self.y;
				newAxe.lastY = newAxe.y;
				newAxe.lastX = newAxe.x;
				game.addChild(newAxe);
				vikingAxes.push(newAxe); // Add to the vikingAxes array
				// Optional: Add throwing sound effect here later
			}
		}
	};
	return self;
});
/** 
* Represents an Axe thrown by a Viking Ally.
* @param {number} angle - The angle in radians at which the axe is thrown.
*/ 
var VikingAxe = Container.expand(function (angle) {
	var self = Container.call(this);
	var graphics = self.attachAsset('viking_axe', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	graphics.rotation = angle + Math.PI / 2; // Align axe graphic with direction
	self.speed = 25; // Speed of the axe
	// Apply refined projectiles bonus if enabled
	if (refinedProjectilesEnabled) {
		self.speed += 5;
	}
	self.vx = Math.sin(angle) * self.speed; // Horizontal velocity component
	self.vy = -Math.cos(angle) * self.speed; // Vertical velocity component (negative Y is up)
	self.damage = 3; // Base damage dealt by this axe
	// Apply refined projectiles bonus if enabled
	if (refinedProjectilesEnabled) {
		self.damage += 5;
	}
	self.pierceLeft = 3; // Can pierce through 3 enemies
	/** 
	* Update method called each game tick by the LK engine.
	* Moves the axe based on its velocity and handles rotation.
	*/ 
	self.update = function () {
		self.x += self.vx;
		self.y += self.vy;
		graphics.rotation += 0.2; // Add spinning effect
	};
	return self;
});
/** 
	* Represents a Wizard Tower ally that shoots magic balls.
	*/ 
var WizardTower = Container.expand(function () {
	var self = Container.call(this);
	// Create and attach the wizard tower graphic asset
	var graphics = self.attachAsset('wizard_tower_asset', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.attackRange = Infinity; // Infinite attack range
	self.attackDamage = 0.5; // Low damage, primary effect is slowdown
	self.attackInterval = 120; // Attack every 2 seconds (120 ticks)
	self.attackTimer = 0; // Timer for attacks
	self.slowDuration = 180; // Duration of slowdown effect in ticks (3 seconds)
	self.slowAmount = 0.5; // Multiplier for enemy speed (0.5 means 50% slower)
	/** 
	* Update method called each game tick by the LK engine.
	* Handles attacking enemies.
	*/ 
	self.update = function () {
		self.attackTimer++;
		var effectiveAttackInterval = Math.max(60, self.attackInterval * allyAttackSpeedMultiplier); // Apply ally attack speed upgrade
		if (self.attackTimer >= effectiveAttackInterval) {
			self.attackTimer = 0; // Reset timer
			// Find the closest enemy within range to shoot at
			var closestEnemy = null;
			var closestDistance = self.attackRange; // Limit to attack range
			for (var i = 0; i < enemies.length; i++) {
				var enemy = enemies[i];
				// Calculate distance to the enemy
				var dx = enemy.x - self.x;
				var dy = enemy.y - self.y;
				var distance = Math.sqrt(dx * dx + dy * dy);
				if (distance < closestDistance) {
					closestDistance = distance;
					closestEnemy = enemy;
				}
			}
			// If an enemy is found, fire a magic ball
			if (closestEnemy) {
				// Calculate angle towards the closest enemy
				var angle = Math.atan2(closestEnemy.x - self.x, -(closestEnemy.y - self.y));
				// Create a new magic ball instance
				var newMagicBall = new MagicBall(angle);
				// Position the magic ball at the tower's location
				newMagicBall.x = self.x;
				newMagicBall.y = self.y;
				newMagicBall.lastY = newMagicBall.y; // Initialize lastY for state tracking
				newMagicBall.lastX = newMagicBall.x; // Initialize lastX for state tracking
				newMagicBall.slowDuration = self.slowDuration; // Pass slow duration to the magic ball
				newMagicBall.slowAmount = self.slowAmount; // Pass slow amount to the magic ball
				// Add the magic ball to the game scene and the tracking array.
				game.addChild(newMagicBall);
				magicBalls.push(newMagicBall); // Add to the magicBalls array
				// Optional: Add a visual/sound effect for magic ball shot here later
			}
		}
	};
	return self; // Return self for potential inheritance
});

/**** 
* Initialize Game
****/ 
// Create the main game instance with a dark background color.
var game = new LK.Game({
	backgroundColor: 0x101030 // Dark blue/purple background
});

/**** 
* Game Code
****/ 
//Minimalistic tween library which should be used for animations over time, including tinting / colouring an object, scaling, rotating, or changing any game object property.
//Only include the plugins you need to create the game.
//We have access to the following plugins. (Note that the variable names used are mandetory for each plugin)
//Storage library which should be used for persistent game data
//var storage = LK.import('@upit/storage.v1');
//Library for using the camera (the background becomes the user's camera video feed) and the microphone. It can access face coordinates for interactive play, as well detect microphone volume / voice interactions
//var facekit = LK.import('@upit/facekit.v1');
// Constants defining game dimensions and key vertical positions.
// Placeholder ID, adjust size slightly
// Placeholder ID
// Placeholder ID, adjust size slightly, reuse flipX
// Use actual spearman asset
// Use actual war elephant asset
var GAME_WIDTH = 2048;
var GAME_HEIGHT = 2732;
var BASTION_Y = GAME_HEIGHT - 250; // Y-coordinate representing the defense line. Enemies crossing this trigger game over.
var FIRING_POS_Y = GAME_HEIGHT - 150; // Y-coordinate from where arrows are fired.
var FIRING_POS_X = GAME_WIDTH / 2; // X-coordinate from where arrows are fired (center).
// Arrays to keep track of active arrows and enemies.
var arrows = [];
var enemies = [];
// Variables for game state and difficulty scaling.
var scoreTxt; // Text2 object for displaying the score.
var ammoTxt; // Text2 object for displaying the current ammo count.
var dragStartX = null; // Starting X coordinate of a touch/mouse drag.
var dragStartY = null; // Starting Y coordinate of a touch/mouse drag.
var enemySpawnInterval = 120; // Initial ticks between enemy spawns (2 seconds at 60 FPS).
var arrowsFired = 0; // Counter for arrows fired since the last cooldown.
var cooldownTimer = 0; // Timer in ticks for the cooldown period.
var cooldownDuration = 6 * 60; // Cooldown duration in ticks (6 seconds * 60 ticks/sec). Min duration enforced in upgrade.
var maxArrowsBeforeCooldown = 15; // Max arrows before reload (Quiver upgrade)
var arrowPierceLevel = 1; // How many enemies an arrow can pierce (Piercing Shots upgrade)
var arrowDamage = 1; // Base damage for arrows (Heat-tipped arrows upgrade)
var enemySpeedMultiplier = 1.0; // Multiplier for enemy speed (Sabotage upgrade) Min multiplier enforced in upgrade.
var minEnemySpawnInterval = 30; // Minimum ticks between enemy spawns (0.5 seconds).
var enemySpawnRateDecrease = 0.08; // Amount to decrease spawn interval each time an enemy spawns.
var currentEnemySpeed = 3; // Initial base speed of enemies.
var maxEnemySpeed = 12; // Maximum base speed enemies can reach.
var enemySpeedIncrease = 0.015; // Amount to increase enemy base speed each time an enemy spawns.
var archerAllies = []; // Array to hold ArcherAlly instances
var swordsmen = []; // Array to hold Swordsman instances
var cannonballs = []; // Array to hold Cannonball instances
var multiShotEnabled = false; // Flag for More Shots upgrade
var poisonShotsEnabled = false; // Flag for Poison Shots upgrade
var cannons = []; // Array to hold Cannon instances
var allyAttackSpeedMultiplier = 1.0; // Multiplier for ally attack speed
var wizardTowers = []; // Array to hold WizardTower instances
var magicBalls = []; // Array to hold MagicBall instances
var aimbotEnabled = false; // Flag for Aimbot upgrade
var greenKillerEnabled = false; // Flag for Green Killer upgrade
var refinedProjectilesEnabled = false; // Flag for Refined Projectiles upgrade
var greenSlowdownEnabled = false; // Flag for Green Slowdown upgrade
var vikingAllies = []; // Array to hold VikingAlly instances
var vikingAxes = []; // Array to hold VikingAxe instances
// --- Enemypedia System ---
var enemyPediaData = [{
	name: 'Swordsman',
	assetId: 'enemy',
	description: 'A basic melee unit. The backbone of early waves.',
	stats: ['Health: Low (scales with progression)', 'Speed: Moderate (scales)', 'Dodge: 0%'],
	tags: []
}, {
	name: 'Knight',
	assetId: 'knight',
	description: 'A tougher melee unit, clad in armor. Appears from score 23.',
	stats: ['Health: Medium (scales significantly)', 'Speed: Slightly Slower (scales)', 'Dodge: 0%', 'Special: Increased durability'],
	tags: []
}, {
	name: 'Thief',
	assetId: 'thief',
	description: 'A fast and evasive unit. Appears from score 15.',
	stats: ['Health: Very Low (1 base)', 'Speed: Very Fast (scales significantly)', 'Dodge: 10%', 'Special: High speed, chance to dodge attacks'],
	tags: []
}, {
	name: 'Boss',
	assetId: 'boss',
	description: 'A formidable leader enemy appearing periodically (every 7th spawn after score 10). Very tough.',
	stats: ['Health: Very High (scales massively with score)', 'Speed: Slow (scales)', 'Dodge: 0%', 'Special: Extremely durable, a major threat'],
	tags: []
}, {
	name: 'Shield Enemy',
	assetId: 'shield_enemy',
	description: 'Carries a large shield, making it very resilient. Appears from score 30.',
	stats: ['Health: High (scales significantly)', 'Speed: Very Slow (scales)', 'Dodge: 0%', 'Special: Absorbs a lot of damage'],
	tags: []
}, {
	name: 'Wizard',
	assetId: 'wizard_enemy',
	description: 'A magical foe that can teleport to advance. Appears from score 25.',
	stats: ['Health: Low (scales)', 'Speed: Slow, but teleports (movement speed scales)', 'Dodge: 0%', 'Special: Teleports forward periodically'],
	tags: ['Green']
}, {
	name: 'Spearman',
	assetId: 'spearman',
	description: 'A common enemy unit. Appears from score 10.',
	stats: ['Health: Low (scales)', 'Speed: Moderate (scales)', 'Dodge: 0%'],
	tags: ['Green']
}, {
	name: 'War Elephant',
	assetId: 'war_elephant',
	description: 'A massive, slow behemoth that spawns Spearmen upon defeat. Appears from score 125.',
	stats: ['Health: Extremely High (scales massively)', 'Speed: Extremely Slow (scales)', 'Dodge: 0%', 'Special: Spawns 5 Spearmen on death'],
	tags: ['Green']
}, {
	name: 'Elite Knight',
	assetId: 'elite_knight_asset',
	description: 'A heavily armored knight, tougher than its standard counterpart. Appears from score 100.',
	stats: ['Health: High (scales significantly)', 'Speed: Slower (scales)', 'Dodge: 0%', 'Special: Superior durability'],
	tags: []
}, {
	name: 'Elite Shield',
	assetId: 'elite_shield_asset',
	description: 'The ultimate defensive unit with an incredibly tough shield. Appears from score 112.',
	stats: ['Health: Very High (scales massively)', 'Speed: Extremely Slow (scales)', 'Dodge: 0%', 'Special: Unmatched resilience'],
	tags: []
}, {
	name: 'Shaman',
	assetId: 'shaman_enemy',
	description: 'A mystical enemy that interferes with your reload. Appears from score 35.',
	stats: ['Health: Low (scales)', 'Speed: Moderate (scales)', 'Dodge: 0%', 'Special: Periodically increases player arrow reload count'],
	tags: ['Green']
}, {
	name: 'Hot Air Balloon',
	assetId: 'hot_air_balloon_asset',
	description: 'A slow aerial transport that deploys enemies upon destruction. Appears from score 154.',
	stats: ['Health: Very Low (1 base)', 'Speed: Very Slow (scales)', 'Dodge: 0%', 'Special: Spawns 5 random non-green enemies on death'],
	tags: []
}, {
	name: 'Dark Bowman',
	assetId: 'dark_bowman_asset',
	description: 'A sinister archer immune to arrows. Appears from score 55.',
	stats: ['Health: Low (scales)', 'Speed: Fast (scales)', 'Dodge: 0%', 'Special: Immune to arrow projectiles'],
	tags: ['Black']
}];
var enemypediaScreenInstance = null; // Instance of the EnemypediaScreen class
var isEnemypediaActive = false; // Flag if the enemypedia is currently shown
var enemypediaButtonContainer = null; // UI Button to open the pedia
// --- Upgrade System ---
var lastUpgradeScore = -1; // Score at which the last upgrade was offered
var isUpgradePopupActive = false; // Flag indicating if the upgrade choice popup is visible
var upgradePopup = null; // Container for the upgrade UI elements
var currentMusicPlaying = 'Gamemusic'; // Track which music is currently playing
var musicFadeInProgress = false; // Flag to track if a music fade transition is in progress
// Helper function to apply Sabotage effect to existing enemies
function applySabotage() {
	for (var i = 0; i < enemies.length; i++) {
		// We assume Enemy class will use enemySpeedMultiplier when calculating effective speed
		// If Enemy.speed stores base speed, we might need an effectiveSpeed method or update speed directly.
		// For simplicity, let's assume Enemy.update uses the global multiplier.
		// If direct modification is needed: enemies[i].speed = baseSpeed * enemySpeedMultiplier;
	}
	// Also update the current base speed calculation baseline if necessary, though modifying the multiplier should suffice.
}
// Helper function placeholder for adding Archer Ally
function addArcherAlly() {
	// Implementation requires ArcherAlly class definition
	console.log("Archer Ally upgrade chosen!");
	var ally = new ArcherAlly();
	// Position the ally next to the player's firing position, slightly offset.
	ally.x = FIRING_POS_X + 150; // Position to the right of the player
	ally.y = FIRING_POS_Y;
	game.addChild(ally);
	archerAllies.push(ally); // Add to the new archerAllies array
}
// Helper function to add a Cannon ally
function addCannon() {
	console.log("Cannon upgrade chosen!");
	var newCannon = new Cannon();
	// Position the cannon near the bastion line
	newCannon.x = GAME_WIDTH / 2 - 300; // Example position to the left of center
	newCannon.y = BASTION_Y - 100; // Position above the bastion line
	game.addChild(newCannon);
	cannons.push(newCannon); // Add to the cannons array
}
// Helper function to add a Wizard Tower
function addWizardTower() {
	console.log("Wizard Tower upgrade chosen!");
	var newTower = new WizardTower();
	// Position the wizard tower near the bastion line, offset from center
	newTower.x = GAME_WIDTH / 2 + 300; // Example position to the right of center
	newTower.y = BASTION_Y - 100; // Position above the bastion line
	game.addChild(newTower);
	wizardTowers.push(newTower); // Add to the wizardTowers array
}
// Helper function to add a Viking Ally
function addVikingAlly() {
	console.log("Viking Ally upgrade chosen!");
	var newViking = new VikingAlly();
	// Position the viking near the bastion line, offset from cannons/towers
	newViking.x = GAME_WIDTH / 2; // Center for now
	newViking.y = BASTION_Y - 100; // Position above the bastion line
	game.addChild(newViking);
	vikingAllies.push(newViking); // Add to the vikingAllies array
}
// --- Enemypedia Functions ---
function showEnemypediaScreen() {
	if (isEnemypediaActive || isUpgradePopupActive) return; // Don't show if already active or upgrade popup is on
	isEnemypediaActive = true;
	if (enemypediaScreenInstance) {
		enemypediaScreenInstance.destroy();
	}
	enemypediaScreenInstance = new EnemypediaScreen();
	game.addChild(enemypediaScreenInstance);
	// Music handling can be added here if desired, similar to upgrade popup
}
function hideEnemypediaScreen() {
	if (!isEnemypediaActive) return;
	isEnemypediaActive = false;
	if (enemypediaScreenInstance) {
		enemypediaScreenInstance.destroy();
		enemypediaScreenInstance = null;
	}
	// Music handling can be added here if desired
}
// Helper function placeholder for adding Swordsman
function addSwordsman() {
	// Create a swordsman tower at the bastion line
	var tower = new Container();
	var towerGraphics = tower.attachAsset('swordsmanTower', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	tower.x = FIRING_POS_X; // Position in the center horizontally
	tower.y = BASTION_Y - 50; // Position just above the bastion line
	game.addChild(tower);
	// Set up interval to spawn swordsmen from the tower
	var spawnInterval = LK.setInterval(function () {
		var newSwordsman = new Swordsman();
		// Position the swordsman near the tower with a slight random offset
		newSwordsman.x = tower.x + (Math.random() * 100 - 50); // Random offset of ±50px
		newSwordsman.y = tower.y;
		game.addChild(newSwordsman);
		swordsmen.push(newSwordsman); // Add to the swordsmen array
	}, 3000); // Spawn a swordsman every 3 seconds
	// Swordsman spawn does not grant score
	// Store the interval reference in the tower to potentially clear it later
	tower.spawnInterval = spawnInterval;
}
// Define all possible upgrades
var allUpgrades = [{
	id: 'faster_reload',
	name: 'Faster Reload',
	description: 'Decrease reload time by 20%',
	apply: function apply() {
		cooldownDuration = Math.max(60, Math.floor(cooldownDuration * 0.8));
	}
},
// Min 1 sec cooldown
{
	id: 'piercing_shots',
	name: 'Piercing Shots',
	description: 'Arrows pierce +1 enemy',
	apply: function apply() {
		arrowPierceLevel++;
	}
}, {
	id: 'quiver',
	name: 'Quiver',
	description: '+5 Arrows before reload',
	apply: function apply() {
		maxArrowsBeforeCooldown += 5;
	}
}, {
	id: 'heat_tipped',
	name: 'Heat-tipped Arrows',
	description: 'Arrows deal +1 damage',
	apply: function apply() {
		arrowDamage += 1;
		console.log("Heat-tipped Arrows upgrade chosen - damage increased to " + arrowDamage);
	}
}, {
	id: 'archer_ally',
	name: 'Archer Ally',
	description: 'Gain an allied archer',
	apply: addArcherAlly
}, {
	id: 'sabotage',
	name: 'Sabotage',
	description: 'Enemies 10% slower',
	apply: function apply() {
		enemySpeedMultiplier = Math.max(0.5, enemySpeedMultiplier * 0.9);
		applySabotage();
	}
},
// Max 50% slow
{
	id: 'swordsman',
	name: 'Swordsman',
	description: 'Gain a melee defender',
	apply: addSwordsman
}, {
	id: 'more_shots',
	name: 'More Shots',
	description: 'Shoot 2 arrows at once',
	apply: function apply() {
		multiShotEnabled = true; // Assuming a global flag for this
	}
}, {
	id: 'poison_shots',
	name: 'Poison Shots',
	description: 'Shots deal damage over time',
	apply: function apply() {
		poisonShotsEnabled = true; // Assuming a global flag for this
	}
}, {
	id: 'cannon',
	name: 'Cannon',
	description: 'Gain a cannon that targets the strongest enemy',
	apply: addCannon // Assuming a helper function addCannon
}, {
	id: 'ally_atk_speed',
	name: 'Ally ATK Speed',
	description: 'All allies attack faster',
	apply: function apply() {
		allyAttackSpeedMultiplier *= 0.8; // Assuming a global multiplier
		// Apply to existing allies as well in their update logic or a helper function
	}
}, {
	id: 'wizard_tower',
	name: 'Wizard Tower',
	description: 'Gain a wizard tower ally that shoots magic balls that slowdown enemies',
	apply: addWizardTower // Assuming a helper function addWizardTower
}, {
	id: 'aimbot',
	name: 'Aimbot',
	description: 'Arrows seek out enemies',
	apply: function apply() {
		aimbotEnabled = true; // Assuming a global flag for this
	}
}, {
	id: 'green_killer',
	name: 'Green Killer',
	description: '+50% Damage vs Green Enemies',
	apply: function apply() {
		greenKillerEnabled = true;
	}
}, {
	id: 'refined_projectiles',
	name: 'Refined Projectiles',
	description: 'Non-arrow projectiles +5 damage & faster',
	apply: function apply() {
		refinedProjectilesEnabled = true;
		// Existing projectiles won't update, new ones will have bonus
	}
}, {
	id: 'viking_ally',
	name: 'Viking Ally',
	description: 'Gain a viking that throws piercing axes',
	apply: addVikingAlly // Assuming helper function addVikingAlly
}, {
	id: 'green_slowdown',
	name: 'Green Slowdown',
	description: 'Projectiles slow Green enemies 10% for 10s (no stack)',
	apply: function apply() {
		greenSlowdownEnabled = true;
	}
}];
// Function to create and show the upgrade selection popup
function showUpgradePopup() {
	isUpgradePopupActive = true;
	// Simple pause: Game logic checks isUpgradePopupActive flag in game.update
	// Switch to upgrade theme music with fade effect
	if (currentMusicPlaying !== 'UpgradeTheme' && !musicFadeInProgress) {
		musicFadeInProgress = true;
		// Fade out current music
		LK.playMusic('Gamemusic', {
			fade: {
				start: 1,
				end: 0,
				duration: 800
			}
		});
		// After fade out completes, start upgrade theme with fade in
		LK.setTimeout(function () {
			LK.playMusic('UpgradeTheme', {
				fade: {
					start: 0,
					end: 1,
					duration: 1000
				}
			});
			currentMusicPlaying = 'UpgradeTheme';
			musicFadeInProgress = false;
		}, 850);
	}
	// --- Create Popup UI ---
	upgradePopup = new Container();
	upgradePopup.x = GAME_WIDTH / 2;
	upgradePopup.y = GAME_HEIGHT / 2;
	game.addChild(upgradePopup); // Add to game layer for positioning relative to center
	// Add a semi-transparent background overlay
	var bg = upgradePopup.attachAsset('bastionLine', {
		// Reusing an asset for shape
		width: 1200,
		height: 800,
		color: 0x000000,
		// Black background
		anchorX: 0.5,
		anchorY: 0.5,
		alpha: 0.8
	});
	// Add title text
	var title = new Text2('Choose an Upgrade!', {
		size: 80,
		fill: 0xFFFFFF
	});
	title.anchor.set(0.5, 0.5);
	title.y = -300; // Position relative to popup center
	upgradePopup.addChild(title);
	// --- Select 3 Random Unique Upgrades ---
	var availableToOffer = allUpgrades.slice(); // Copy available upgrades
	var choices = [];
	var numChoices = Math.min(3, availableToOffer.length); // Offer up to 3 choices
	for (var i = 0; i < numChoices; i++) {
		var randomIndex = Math.floor(Math.random() * availableToOffer.length);
		choices.push(availableToOffer[randomIndex]);
		availableToOffer.splice(randomIndex, 1); // Remove chosen upgrade to ensure uniqueness
	}
	// --- Create Buttons for Choices ---
	var buttonYStart = -150;
	var buttonSpacing = 180;
	for (var j = 0; j < choices.length; j++) {
		var upgrade = choices[j];
		var button = createUpgradeButton(upgrade, buttonYStart + j * buttonSpacing);
		upgradePopup.addChild(button);
	}
}
// Function to create a single upgrade button
function createUpgradeButton(upgradeData, yPos) {
	var buttonContainer = new Container();
	buttonContainer.y = yPos;
	// Button background
	var buttonBg = buttonContainer.attachAsset('bastionLine', {
		// Reusing asset for shape
		width: 800,
		height: 150,
		color: 0x555555,
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Button text (Name + Description)
	var nameText = new Text2(upgradeData.name, {
		size: 50,
		fill: 0xFFFFFF
	});
	nameText.anchor.set(0.5, 0.5);
	nameText.y = -25;
	buttonContainer.addChild(nameText);
	var descText = new Text2(upgradeData.description, {
		size: 35,
		fill: 0xCCCCCC
	});
	descText.anchor.set(0.5, 0.5);
	descText.y = 30;
	buttonContainer.addChild(descText);
	// Make button interactive
	buttonContainer.interactive = true; // Needed for down event
	// Event handler for button press
	buttonContainer.down = function (x, y, obj) {
		upgradeData.apply(); // Apply the selected upgrade's effect
		hideUpgradePopup(); // Close the popup
	};
	return buttonContainer;
}
// Function to hide and destroy the upgrade popup
function hideUpgradePopup() {
	if (upgradePopup) {
		upgradePopup.destroy();
		upgradePopup = null;
	}
	isUpgradePopupActive = false;
	// Switch back to game music with fade effect
	if (currentMusicPlaying !== 'Gamemusic' && !musicFadeInProgress) {
		musicFadeInProgress = true;
		// Fade out upgrade theme
		LK.playMusic('UpgradeTheme', {
			fade: {
				start: 1,
				end: 0,
				duration: 800
			}
		});
		// After fade out completes, start game music with fade in
		LK.setTimeout(function () {
			LK.playMusic('Gamemusic', {
				fade: {
					start: 0,
					end: 1,
					duration: 1000
				}
			});
			currentMusicPlaying = 'Gamemusic';
			musicFadeInProgress = false;
		}, 850);
	}
	// Resume game logic (handled by checking flag in game.update)
}
// --- Visual Setup ---
var bastionLine = game.addChild(LK.getAsset('bastionLine', {
	anchorX: 0.0,
	// Anchor at the left edge.
	anchorY: 0.5,
	// Anchor vertically centered.
	x: 0,
	// Position at the left edge of the screen.
	y: BASTION_Y // Position at the defined bastion Y-coordinate.
}));
// Create and configure the score display text.
scoreTxt = new Text2('0', {
	size: 150,
	// Font size.
	fill: 0xFFFFFF // White color.
});
scoreTxt.anchor.set(0.5, 0); // Anchor at the horizontal center, top edge.
// Add score text to the GUI layer at the top-center position.
LK.gui.top.addChild(scoreTxt);
scoreTxt.y = 30; // Add padding below the top edge. Ensure it's clear of the top-left menu icon area.
// Create and configure the ammo display text.
ammoTxt = new Text2('Ammo: ' + maxArrowsBeforeCooldown, {
	size: 80,
	fill: 0xFFFFFF // White color.
});
ammoTxt.anchor.set(0.5, 0); // Anchor at the horizontal center, top edge.
LK.gui.top.addChild(ammoTxt);
ammoTxt.y = 180; // Position below the score text
// --- Input Event Handlers ---
// Handles touch/mouse press down event on the game area.
game.down = function (x, y, obj) {
	// Record the starting position of the drag in game coordinates.
	var gamePos = game.toLocal({
		x: x,
		y: y
	});
	dragStartX = gamePos.x;
	dragStartY = gamePos.y;
	// Potential enhancement: Show an aiming indicator originating from FIRING_POS_X, FIRING_POS_Y towards the drag point.
};
// Handles touch/mouse move event while dragging on the game area.
game.move = function (x, y, obj) {
	// Only process if a drag is currently active.
	if (dragStartX !== null) {
		var gamePos = game.toLocal({
			x: x,
			y: y
		});
		// Potential enhancement: Update the aiming indicator based on the current drag position (gamePos).
	}
};
// Handles touch/mouse release event on the game area.
game.up = function (x, y, obj) {
	// Only process if a drag was active.
	if (dragStartX !== null && cooldownTimer <= 0) {
		// Only allow firing if not on cooldown.
		var gamePos = game.toLocal({
			x: x,
			y: y
		});
		var dragEndX = gamePos.x;
		var dragEndY = gamePos.y;
		// Calculate the difference between the firing position and the release point to determine direction.
		// A longer drag could potentially mean more power, but we'll keep it simple: direction only.
		var dx = dragEndX - FIRING_POS_X;
		var dy = dragEndY - FIRING_POS_Y;
		// Avoid division by zero or zero vector if start and end points are the same.
		if (dx === 0 && dy === 0) {
			// Optionally handle this case, e.g., fire straight up or do nothing.
			// Let's fire straight up if drag distance is negligible.
			dy = -1;
		}
		// Calculate the angle using atan2. Note the order (dx, dy) and the negation of dy
		// because the Y-axis is inverted in screen coordinates (positive Y is down).
		var angle = Math.atan2(dx, -dy);
		// Create a new arrow instance with the calculated angle.
		var newArrow = new Arrow(angle);
		newArrow.x = FIRING_POS_X;
		newArrow.y = FIRING_POS_Y;
		// Initialize last position for state tracking (e.g., off-screen detection)
		newArrow.lastY = newArrow.y;
		newArrow.lastX = newArrow.x;
		// Add the arrow to the game scene and the tracking array.
		game.addChild(newArrow);
		arrows.push(newArrow);
		if (multiShotEnabled) {
			// Fire a second arrow with a slight angle offset
			var angle2 = angle + Math.PI / 12; // Offset by 15 degrees
			var newArrow2 = new Arrow(angle2);
			newArrow2.x = FIRING_POS_X;
			newArrow2.y = FIRING_POS_Y;
			newArrow2.lastY = newArrow2.y;
			newArrow2.lastX = newArrow2.x;
			game.addChild(newArrow2);
			arrows.push(newArrow2);
			// Fire a third arrow with the opposite angle offset
			var angle3 = angle - Math.PI / 12; // Offset by -15 degrees
			var newArrow3 = new Arrow(angle3);
			newArrow3.x = FIRING_POS_X;
			newArrow3.y = FIRING_POS_Y;
			newArrow3.lastY = newArrow3.y;
			newArrow3.lastX = newArrow3.x;
			game.addChild(newArrow3);
			arrows.push(newArrow3);
		}
		LK.getSound('shoot').play(); // Play shooting sound.
		arrowsFired++; // Increment arrow count.
		ammoTxt.setText('Ammo: ' + (maxArrowsBeforeCooldown - arrowsFired)); // Update ammo display.
		// Check if cooldown needs to start based on Quiver upgrade
		if (arrowsFired >= maxArrowsBeforeCooldown) {
			cooldownTimer = cooldownDuration; // Start cooldown (duration affected by Faster Reload upgrade)
			arrowsFired = 0; // Reset arrow count.
			ammoTxt.setText('Ammo: ' + (maxArrowsBeforeCooldown - arrowsFired)); // Update ammo display.
			LK.getSound('Reload').play(); // Play reload sound.
		}
		// Reset drag state.
		dragStartX = null;
		dragStartY = null;
		// Potential enhancement: Hide the aiming indicator.
	}
};
// --- Main Game Update Loop ---
// This function is called automatically by the LK engine on every frame (tick).
game.update = function () {
	// --- Upgrade System Check ---
	var currentScore = LK.getScore();
	// Check if score reached a multiple of 10 and is higher than the last upgrade score
	// Ensure Enemypedia is not active before showing upgrade popup
	if (!isUpgradePopupActive && !isEnemypediaActive && currentScore > 0 && currentScore % 10 === 0 && currentScore !== lastUpgradeScore) {
		lastUpgradeScore = currentScore; // Mark this score level as having triggered an upgrade offer
		showUpgradePopup(); // Show the upgrade selection screen
	}
	// --- Pause Game Logic if Upgrade Popup or Enemypedia is Active ---
	if (isUpgradePopupActive || isEnemypediaActive) {
		// Added isEnemypediaActive check
		// Potential: Update UI animations if any for popups
		return; // Skip the rest of the game update loop
	}
	// --- Resume Game Logic ---
	// This redundant check can be removed due to the combined check above.
	// if (isUpgradePopupActive) {
	// return; // Skip enemy movement and spawning if upgrade popup is active
	// }
	// Decrease cooldown timer if active.
	if (cooldownTimer > 0) {
		cooldownTimer--;
		ammoTxt.setText('Reloading...'); // Show reloading status
	} else if (ammoTxt.text !== 'Ammo: ' + (maxArrowsBeforeCooldown - arrowsFired)) {
		// Ensure ammo display is correct if not reloading
		ammoTxt.setText('Ammo: ' + (maxArrowsBeforeCooldown - arrowsFired));
	}
	// 1. Update and check Arrows
	for (var i = arrows.length - 1; i >= 0; i--) {
		var arrow = arrows[i];
		// Note: LK engine calls arrow.update() automatically as it's added to the game stage.
		// Initialize last position if it hasn't been set yet (first frame).
		if (arrow.lastY === undefined) {
			arrow.lastY = arrow.y;
		}
		if (arrow.lastX === undefined) {
			arrow.lastX = arrow.x;
		}
		// Check for collisions between the current arrow and all enemies.
		var hitEnemy = false;
		for (var j = enemies.length - 1; j >= 0; j--) {
			var enemy = enemies[j];
			// Use the intersects method for collision detection.
			if (arrow.intersects(enemy)) {
				// Collision detected!
				LK.getSound('hit').play(); // Play hit sound.
				// Calculate damage, applying Green Killer bonus if applicable
				var damageToDeal = arrow.damage;
				if (greenKillerEnabled && enemy.tag === 'Green') {
					damageToDeal *= 1.5; // Apply 50% damage bonus
				}
				// Apply damage to the enemy and check if it was defeated
				var enemyDefeated = enemy.takeDamage(damageToDeal, arrow); // Pass the arrow object as source
				if (enemyDefeated) {
					LK.setScore(LK.getScore() + 1); // Increment score.
					scoreTxt.setText(LK.getScore()); // Update score display.
					// Destroy the enemy
					enemy.destroy();
					enemies.splice(j, 1); // Remove enemy from array.
				}
				// Handle arrow piercing
				arrow.pierceLeft--; // Decrease remaining pierces
				if (arrow.pierceLeft <= 0) {
					// Arrow has no pierces left, destroy it
					arrow.destroy();
					arrows.splice(i, 1); // Remove arrow from array.
					hitEnemy = true; // Mark that this arrow is done
					break; // Stop checking this arrow against other enemies as it's destroyed
				} else {
					// Arrow pierced this enemy and can continue
					// We don't set hitEnemy = true here because the arrow continues
					// We don't break because it might hit another enemy in the same frame further along its path
					// Apply Green Slowdown if applicable and arrow is still piercing
					if (!enemyDefeated && greenSlowdownEnabled && enemy.tag === 'Green' && enemy.slowTimer <= 0) {
						enemy.slowTimer = 10 * 60;
						enemy.currentSlowAmount = 0.9;
					}
				}
			}
		}
		// If the arrow hit an enemy, it was destroyed, so skip to the next arrow.
		if (hitEnemy) {
			continue;
		}
		// Check if the arrow has gone off-screen (top, left, or right).
		// Use transition detection: check if it was on screen last frame and is off screen now.
		var wasOnScreen = arrow.lastY > -arrow.height / 2 && arrow.lastX > -arrow.width / 2 && arrow.lastX < GAME_WIDTH + arrow.width / 2;
		var isOffScreen = arrow.y < -arrow.height / 2 ||
		// Off top edge
		arrow.x < -arrow.width / 2 ||
		// Off left edge
		arrow.x > GAME_WIDTH + arrow.width / 2; // Off right edge
		if (wasOnScreen && isOffScreen) {
			// Arrow is off-screen, destroy it and remove from the array.
			arrow.destroy();
			arrows.splice(i, 1);
		} else if (!isOffScreen) {
			// Update last known position only if the arrow is still potentially on screen
			arrow.lastY = arrow.y;
			arrow.lastX = arrow.x;
		}
	}
	// 2. Update and check Cannonballs
	for (var cb = cannonballs.length - 1; cb >= 0; cb--) {
		var cannonball = cannonballs[cb];
		// Note: LK engine calls cannonball.update() automatically.
		// Initialize last position if it hasn't been set yet (first frame).
		if (cannonball.lastY === undefined) {
			cannonball.lastY = cannonball.y;
		}
		if (cannonball.lastX === undefined) {
			cannonball.lastX = cannonball.x;
		}
		// Check for collisions between the current cannonball and all enemies.
		var hitEnemy = false;
		for (var j = enemies.length - 1; j >= 0; j--) {
			var enemy = enemies[j];
			// Use the intersects method for collision detection.
			if (cannonball.intersects(enemy)) {
				// Collision detected!
				LK.getSound('hit').play(); // Play hit sound.
				// Apply damage to the enemy and check if it was defeated
				var enemyDefeated = enemy.takeDamage(cannonball.damage); // Cannonballs don't apply poison
				if (enemyDefeated) {
					LK.setScore(LK.getScore() + 1); // Increment score.
					scoreTxt.setText(LK.getScore()); // Update score display.
					// Destroy the enemy
					enemy.destroy();
					enemies.splice(j, 1); // Remove enemy from array.
				}
				// Cannonballs are destroyed on hit
				cannonball.destroy();
				// Apply Green Slowdown if applicable before destroying cannonball
				if (greenSlowdownEnabled && enemy.tag === 'Green' && enemy.slowTimer <= 0) {
					enemy.slowTimer = 10 * 60;
					enemy.currentSlowAmount = 0.9;
				}
				cannonball.destroy();
				cannonballs.splice(cb, 1); // Remove cannonball from array.
				hitEnemy = true; // Mark that this cannonball is done
				break; // Stop checking this cannonball against other enemies as it's destroyed
			}
		}
		// If the cannonball hit an enemy, it was destroyed, so skip to the next cannonball.
		if (hitEnemy) {
			continue;
		}
		// Check if the cannonball has gone off-screen.
		var wasOnScreen = cannonball.lastY > -cannonball.height / 2 && cannonball.lastX > -cannonball.width / 2 && cannonball.lastX < GAME_WIDTH + cannonball.width / 2;
		var isOffScreen = cannonball.y < -cannonball.height / 2 ||
		// Off top edge
		cannonball.x < -cannonball.width / 2 ||
		// Off left edge
		cannonball.x > GAME_WIDTH + cannonball.width / 2; // Off right edge
		if (wasOnScreen && isOffScreen) {
			// Cannonball is off-screen, destroy it and remove from the array.
			cannonball.destroy();
			cannonballs.splice(cb, 1);
		} else if (!isOffScreen) {
			// Update last known position only if the cannonball is still potentially on screen
			cannonball.lastY = cannonball.y;
			cannonball.lastX = cannonball.x;
		}
	}
	// 3. Update and check Enemies
	for (var k = enemies.length - 1; k >= 0; k--) {
		var enemy = enemies[k];
		// Note: LK engine calls enemy.update() automatically.
		// Initialize last position if not set.
		if (enemy.lastY === undefined) {
			enemy.lastY = enemy.y;
		}
		// Check if the enemy has reached or passed the bastion line.
		// Use transition detection: was the enemy's bottom edge above the line last frame,
		// and is it on or below the line now?
		var enemyBottomY = enemy.y + enemy.height / 2;
		var enemyLastBottomY = enemy.lastY + enemy.height / 2;
		var wasAboveBastion = enemyLastBottomY < BASTION_Y;
		var isAtOrBelowBastion = enemyBottomY >= BASTION_Y;
		if (wasAboveBastion && isAtOrBelowBastion) {
			// Enemy reached the bastion! Game Over.
			LK.getSound('gameOverSfx').play(); // Play game over sound effect.
			LK.showGameOver(); // Trigger the engine's game over sequence.
			// LK.showGameOver handles game state reset, no need to manually clear arrays here.
			return; // Exit the update loop immediately as the game is over.
		} else {
			// Update last known position if game is not over for this enemy.
			enemy.lastY = enemy.y;
		}
	}
	// 3. Update and check Swordsmen (allies)
	for (var l = swordsmen.length - 1; l >= 0; l--) {
		var swordsman = swordsmen[l];
		// Swordsman update method handles its own lifetime and attacking
		// Check if the swordsman has been destroyed by its lifetime timer
		if (!swordsman.parent) {
			// If it no longer has a parent, it has been destroyed
			swordsmen.splice(l, 1); // Remove swordsman from array
		}
	}
	// 4. Update and check Cannons (allies)
	for (var m = cannons.length - 1; m >= 0; m--) {
		var cannon = cannons[m];
		// Cannons do not have a lifetime timer or destruction logic in this basic version
		// If they had, we'd check !cannon.parent and splice here as in Swordsmen
	}
	// 5. Update and check Wizard Towers (allies)
	for (var wt = wizardTowers.length - 1; wt >= 0; wt--) {
		var tower = wizardTowers[wt];
		// Wizard towers do not have a lifetime timer or destruction logic in this basic version
		// If they had, we'd check !tower.parent and splice here
	}
	// 5.5 Update and check Viking Allies
	for (var va = vikingAllies.length - 1; va >= 0; va--) {
		var viking = vikingAllies[va];
		// Vikings do not have a lifetime timer or destruction logic in this version
		// LK engine calls viking.update() automatically.
	}
	// 6. Update and check Magic Balls
	for (var mb = magicBalls.length - 1; mb >= 0; mb--) {
		var magicBall = magicBalls[mb];
		// Note: LK engine calls magicBall.update() automatically.
		// Initialize last position if it hasn't been set yet (first frame).
		if (magicBall.lastY === undefined) {
			magicBall.lastY = magicBall.y;
		}
		if (magicBall.lastX === undefined) {
			magicBall.lastX = magicBall.x;
		}
		// Check for collisions between the current magic ball and all enemies.
		var hitEnemy = false;
		for (var j = enemies.length - 1; j >= 0; j--) {
			var enemy = enemies[j];
			// Use the intersects method for collision detection.
			if (magicBall.intersects(enemy)) {
				// Collision detected!
				LK.getSound('hit').play(); // Play hit sound.
				// Apply damage (minimal) and slowdown effect to the enemy and check if it was defeated
				var enemyDefeated = enemy.takeDamage(magicBall.damage, magicBall); // Pass the magic ball object as source
				if (enemyDefeated) {
					LK.setScore(LK.getScore() + 1); // Increment score.
					scoreTxt.setText(LK.getScore()); // Update score display.
					// Destroy the enemy
					enemy.destroy();
					enemies.splice(j, 1); // Remove enemy from array.
				}
				// Magic balls are destroyed on hit
				magicBall.destroy();
				// Apply Green Slowdown if applicable before destroying magic ball
				if (greenSlowdownEnabled && enemy.tag === 'Green' && enemy.slowTimer <= 0) {
					// Note: Enemy.takeDamage already checks for MagicBall source to apply its default slow.
					// This adds the Green Slowdown effect *on top* if applicable and not already slowed.
					// However, takeDamage applies slow based on MagicBall properties. Let's apply Green Slowdown here explicitly.
					enemy.slowTimer = 10 * 60; // 10 seconds
					enemy.currentSlowAmount = 0.9; // 10% slow
				}
				magicBall.destroy();
				magicBalls.splice(mb, 1); // Remove magic ball from array.
				hitEnemy = true; // Mark that this magic ball is done
				break; // Stop checking this magic ball against other enemies as it's destroyed
			}
		}
		// If the magic ball hit an enemy, it was destroyed, so skip to the next magic ball.
		if (hitEnemy) {
			continue;
		}
		// Check if the magic ball has gone off-screen.
		var wasOnScreen = magicBall.lastY > -magicBall.height / 2 && magicBall.lastX > -magicBall.width / 2 && magicBall.lastX < GAME_WIDTH + magicBall.width / 2;
		var isOffScreen = magicBall.y < -magicBall.height / 2 ||
		// Off top edge
		magicBall.x < -magicBall.width / 2 ||
		// Off left edge
		magicBall.x > GAME_WIDTH + magicBall.width / 2; // Off right edge
		if (wasOnScreen && isOffScreen) {
			// Magic ball is off-screen, destroy it and remove from the array.
			magicBall.destroy();
			magicBalls.splice(mb, 1);
		} else if (!isOffScreen) {
			// Update last known position only if the magic ball is still potentially on screen
			magicBall.lastY = magicBall.y;
			magicBall.lastX = magicBall.x;
		}
	}
	// 6.5 Update and check Viking Axes
	for (var axeIdx = vikingAxes.length - 1; axeIdx >= 0; axeIdx--) {
		var axe = vikingAxes[axeIdx];
		// Note: LK engine calls axe.update() automatically.
		// Initialize last position if it hasn't been set yet (first frame).
		if (axe.lastY === undefined) {
			axe.lastY = axe.y;
		}
		if (axe.lastX === undefined) {
			axe.lastX = axe.x;
		}
		// Check for collisions between the current axe and all enemies.
		var hitEnemyAxe = false;
		for (var j = enemies.length - 1; j >= 0; j--) {
			var enemy = enemies[j];
			if (axe.intersects(enemy)) {
				// Collision detected!
				LK.getSound('hit').play(); // Play hit sound.
				// Apply Green Killer bonus if applicable (Vikings benefit too)
				var damageToDealAxe = axe.damage;
				if (greenKillerEnabled && enemy.tag === 'Green') {
					damageToDealAxe *= 1.5; // Apply 50% damage bonus
				}
				// Apply damage and check if defeated
				var enemyDefeated = enemy.takeDamage(damageToDealAxe, axe); // Pass axe as source for potential effects
				if (enemyDefeated) {
					LK.setScore(LK.getScore() + 1); // Increment score.
					scoreTxt.setText(LK.getScore()); // Update score display.
					enemy.destroy();
					enemies.splice(j, 1); // Remove enemy from array.
				}
				// Handle axe piercing
				axe.pierceLeft--; // Decrease remaining pierces
				if (axe.pierceLeft <= 0) {
					// Axe has no pierces left, destroy it
					axe.destroy();
					vikingAxes.splice(axeIdx, 1); // Remove axe from array.
					hitEnemyAxe = true; // Mark that this axe is done
					break; // Stop checking this axe against other enemies
				} else {
					// Axe pierced this enemy and can continue
					// Potentially apply Green Slowdown if enabled
					if (greenSlowdownEnabled && enemy.tag === 'Green' && enemy.slowTimer <= 0) {
						enemy.slowTimer = 10 * 60;
						enemy.currentSlowAmount = 0.9;
					}
				}
			}
		}
		// If the axe hit and was destroyed, skip to the next axe.
		if (hitEnemyAxe) {
			continue;
		}
		// Check if the axe has gone off-screen.
		var wasOnScreenAxe = axe.lastY > -axe.height / 2 && axe.lastX > -axe.width / 2 && axe.lastX < GAME_WIDTH + axe.width / 2;
		var isOffScreenAxe = axe.y < -axe.height / 2 || axe.y > GAME_HEIGHT + axe.height / 2 || axe.x < -axe.width / 2 || axe.x > GAME_WIDTH + axe.width / 2;
		if (wasOnScreenAxe && isOffScreenAxe) {
			axe.destroy();
			vikingAxes.splice(axeIdx, 1);
		} else if (!isOffScreenAxe) {
			axe.lastY = axe.y;
			axe.lastX = axe.x;
		}
	}
	// 7. Spawn new Enemies periodically
	// Use LK.ticks and the spawn interval. Ensure interval doesn't go below minimum.
	if (LK.ticks % Math.max(minEnemySpawnInterval, Math.floor(enemySpawnInterval)) === 0) {
		var currentScore = LK.getScore();
		var baseSpeedForSpawn = Math.min(maxEnemySpeed, currentEnemySpeed); // Base speed adjusted by game difficulty progression
		// Determine if this spawn *could* be a boss (e.g., every 7th spawn after score 10)
		var potentialBoss = (enemies.length + 1) % 7 === 0 && currentScore >= 10;
		var typeToSpawn = 'swordsman'; // Default type
		var enemyHealth = 1; // Default health
		var enemyDodgeChance = 0; // Default dodge chance
		var enemySpeed = baseSpeedForSpawn; // Start with base speed
		// Determine base type based on score thresholds and randomness
		var possibleTypes = ['swordsman'];
		if (currentScore >= 10) {
			// Spearman appears at score 10
			possibleTypes.push('spearman');
		}
		if (currentScore >= 15) {
			possibleTypes.push('thief');
		} //{3s} // Adjusted original line identifier
		if (currentScore >= 23) {
			possibleTypes.push('knight');
		} //{3t} // Adjusted original line identifier
		if (currentScore >= 25) {
			possibleTypes.push('wizard');
		} // Wizards start appearing at score 25
		if (currentScore >= 30) {
			possibleTypes.push('shield');
		} // Shields start appearing at score 30
		if (currentScore >= 35) {
			possibleTypes.push('shaman'); // Shaman appears at score 35
			console.log("Shaman added to possible enemy types");
		}
		if (currentScore >= 55) {
			possibleTypes.push('dark_bowman'); // Dark bowman appears at score 55
		}
		if (currentScore >= 100) {
			possibleTypes.push('elite_knight');
		} // Elite Knights start appearing at score 100
		if (currentScore >= 112) {
			possibleTypes.push('elite_shield'); // Elite Shields appear at score 112
		}
		if (currentScore >= 125) {
			// War Elephant appears at score 125
			possibleTypes.push('war_elephant');
		}
		if (currentScore >= 154) {
			// Hot Air Balloon appears at score 154
			possibleTypes.push('hot_air_balloon');
		}
		// Randomly select a type from the available pool for this score level
		var chosenTypeIndex = Math.floor(Math.random() * possibleTypes.length);
		typeToSpawn = possibleTypes[chosenTypeIndex];
		// Set stats based on chosen type and apply score-based scaling
		if (typeToSpawn === 'knight') {
			var baseKnightHP = 5;
			var hpIncreaseIntervalKnight = 30; // Health increases every 30 score points after appearing
			var hpIncreasesKnight = Math.floor(Math.max(0, currentScore - 23) / hpIncreaseIntervalKnight);
			enemyHealth = baseKnightHP + hpIncreasesKnight * 5;
			enemySpeed *= 0.9; // Knights are slightly slower than base swordsman speed
		} else if (typeToSpawn === 'thief') {
			enemyHealth = 1; // Thieves are fragile
			enemyDodgeChance = 0.10; // 10% dodge chance
			var speedIncreaseIntervalThief = 25; // Speed increases every 25 score points after appearing
			var speedIncreasePercentThief = 0.05; // 5% speed increase each time
			var speedIncreasesThief = Math.floor(Math.max(0, currentScore - 15) / speedIncreaseIntervalThief);
			var thiefSpeedMultiplier = Math.pow(1 + speedIncreasePercentThief, speedIncreasesThief);
			enemySpeed *= 1.2 * thiefSpeedMultiplier; // Thieves are faster base + scaling speed
		} else if (typeToSpawn === 'shield') {
			var baseShieldHP = 20;
			var hpIncreaseIntervalShield = 35; // Gains HP every 35 score points after appearing
			var hpIncreasesShield = Math.floor(Math.max(0, currentScore - 30) / hpIncreaseIntervalShield);
			enemyHealth = baseShieldHP + hpIncreasesShield * 20;
			enemySpeed *= 0.5; // Shield enemies are very slow
			enemyDodgeChance = 0;
		} else if (typeToSpawn === 'shaman') {
			var baseShamanHP = 2;
			var statIncreaseIntervalShaman = 10; // Gains stats every 10 score points after appearing
			var statIncreasesShaman = Math.floor(Math.max(0, currentScore - 35) / statIncreaseIntervalShaman);
			enemyHealth = baseShamanHP + statIncreasesShaman * 1; // Gains 1 HP per interval
			enemySpeed *= 0.8 * Math.pow(1.04, statIncreasesShaman); // Base speed, gains 4% speed per interval
			enemyDodgeChance = 0; // Shaman cannot dodge
		} else if (typeToSpawn === 'wizard') {
			var baseWizardHP = 2;
			var statIncreaseIntervalWizard = 10; // Gains stats every 10 score points after appearing
			var statIncreasesWizard = Math.floor(Math.max(0, currentScore - 25) / statIncreaseIntervalWizard);
			enemyHealth = baseWizardHP + statIncreasesWizard * 1; // Gains 1 HP per interval
			enemySpeed *= 0.7 * Math.pow(1.05, statIncreasesWizard); // Slow base, gains 5% speed per interval
			enemyDodgeChance = 0;
		} else if (typeToSpawn === 'elite_knight') {
			var baseEliteKnightHP = 45;
			var hpIncreaseIntervalElite = 30; // Gains HP every 30 score points after appearing
			var hpIncreasesElite = Math.floor(Math.max(0, currentScore - 100) / hpIncreaseIntervalElite);
			enemyHealth = baseEliteKnightHP + hpIncreasesElite * 15;
			enemySpeed *= 0.85; // Slightly slower than base knight speed
			enemyDodgeChance = 0;
		} else if (typeToSpawn === 'elite_shield') {
			var baseEliteShieldHP = 200; // Starts with 200 HP
			var hpIncreaseIntervalEliteShield = 20; // Gains HP every 20 score points after appearing
			var hpIncreasesEliteShield = Math.floor(Math.max(0, currentScore - 112) / hpIncreaseIntervalEliteShield);
			enemyHealth = baseEliteShieldHP + hpIncreasesEliteShield * 50; // Gains 50 HP per interval
			enemySpeed *= 0.4; // Elite Shield enemies are slower than regular shield enemies
			enemyDodgeChance = 0;
		} else if (typeToSpawn === 'spearman') {
			var baseSpearmanHP = 3;
			var hpIncreaseIntervalSpearman = 10; // Gains HP every 10 score points after appearing
			var hpIncreasesSpearman = Math.floor(Math.max(0, currentScore - 10) / hpIncreaseIntervalSpearman);
			enemyHealth = baseSpearmanHP + hpIncreasesSpearman * 3; // Gains 3 HP per interval
			var speedIncreaseIntervalSpearman = 10; // Gains speed every 10 score points after appearing
			var speedIncreasePercentSpearman = 0.05; // 5% speed increase each time
			var speedIncreasesSpearman = Math.floor(Math.max(0, currentScore - 10) / speedIncreaseIntervalSpearman);
			var spearmanSpeedMultiplier = Math.pow(1 + speedIncreasePercentSpearman, speedIncreasesSpearman);
			enemySpeed *= 1.0 * spearmanSpeedMultiplier; // Base speed + scaling speed
			enemyDodgeChance = 0;
		} else if (typeToSpawn === 'war_elephant') {
			var baseElephantHP = 500;
			var hpIncreaseIntervalElephant = 15; // Gains HP every 15 score points after appearing
			var hpIncreasesElephant = Math.floor(Math.max(0, currentScore - 125) / hpIncreaseIntervalElephant);
			enemyHealth = baseElephantHP + hpIncreasesElephant * 100; // Gains 100 HP per interval
			enemySpeed *= 0.3; // War Elephants are very slow
			enemyDodgeChance = 0;
			// Note: War elephant death spawns spearmen - this will be handled in the Enemy death logic.
		} else if (typeToSpawn === 'hot_air_balloon') {
			enemyHealth = 1; // Always has 1 HP
			enemySpeed *= 0.2; // Very slow movement
			enemyDodgeChance = 0;
			// Note: Hot air balloon death spawns 5 random non-green enemies - handled in Enemy death logic
		} else if (typeToSpawn === 'dark_bowman') {
			var baseDarkBowmanHP = 5;
			var statIncreaseIntervalBowman = 10; // Gains stats every 10 score points after appearing
			var statIncreasesBowman = Math.floor(Math.max(0, currentScore - 55) / statIncreaseIntervalBowman);
			enemyHealth = baseDarkBowmanHP + statIncreasesBowman * 3; // Gains 3 HP per interval
			var speedIncreasePercentBowman = 0.05; // 5% speed increase each time
			var bowmanSpeedMultiplier = Math.pow(1 + speedIncreasePercentBowman, statIncreasesBowman);
			enemySpeed *= 1.1 * bowmanSpeedMultiplier; // Slightly faster than base speed + scaling
			enemyDodgeChance = 0;
			// Note: Dark bowman has Black tag making it immune to arrows
		} else {
			// Swordsman (default)
			enemyHealth = 1;
			// Speed remains baseSpeedForSpawn initially
		}
		// Check if this spawn should be overridden to be a Boss
		if (potentialBoss) {
			typeToSpawn = 'boss'; // Set type to boss
			enemyHealth = 5 + Math.floor(currentScore / 8); // Boss health scales significantly with score
			enemySpeed = baseSpeedForSpawn * 0.7; // Bosses are slower but much tougher (reset speed based on base)
			enemyDodgeChance = 0; // Bosses typically don't dodge
		}
		// Apply the global Sabotage speed multiplier AFTER type-specific adjustments
		enemySpeed *= enemySpeedMultiplier;
		// Create the new enemy instance with the calculated stats
		var newEnemy = new Enemy(typeToSpawn, enemySpeed, enemyHealth, enemyDodgeChance);
		// Position the new enemy at the top, random horizontal position with padding
		// Use the actual width of the created enemy's graphic for padding calculation
		// Need to access width after creation, use a sensible default or estimate if needed before creation
		var tempAsset = LK.getAsset(newEnemy.assetId || 'enemy', {}); // Get asset dimensions (might need refinement if assetId isn't on newEnemy yet)
		var spawnPadding = (tempAsset ? tempAsset.width / 2 : 100) + 20; // Use default if asset not found easily
		newEnemy.x = spawnPadding + Math.random() * (GAME_WIDTH - 2 * spawnPadding);
		newEnemy.y = -(tempAsset ? tempAsset.height / 2 : 100); // Start just above the top edge.
		// Initialize last position for state tracking (used for bastion collision check).
		newEnemy.lastY = newEnemy.y;
		// Add the new enemy to the game scene and the tracking array.
		game.addChild(newEnemy);
		enemies.push(newEnemy);
		// Increase difficulty for the next spawn: decrease spawn interval and increase base speed.
		// These affect the *next* potential spawn's base calculations.
		enemySpawnInterval -= enemySpawnRateDecrease;
		currentEnemySpeed += enemySpeedIncrease;
	} //{2s} // Adjusted original line identifier
};
// --- Initial Game Setup ---
// Set the initial score text based on the starting score (which is 0).
scoreTxt.setText(LK.getScore());
// Set the initial ammo display.
if (ammoTxt) {
	// Ensure ammoTxt is initialized
	ammoTxt.setText('Ammo: ' + maxArrowsBeforeCooldown);
}
;
// Play the background music.
// Check if we need to show a title screen first
if (!isGameStarted) {// Assuming a flag 'isGameStarted' for title screen state
	// Don't play music immediately if showing title screen
} else {
	LK.playMusic('Gamemusic');
	;
}
// Placeholder for the title screen container
var titleScreen = null;
// Flag to track game start state
var isGameStarted = false;
// Function to show the title screen
function showTitleScreen() {
	isGameStarted = false; // Ensure game is not started
	// Create the title screen container
	titleScreen = new Container();
	titleScreen.x = GAME_WIDTH / 2;
	titleScreen.y = GAME_HEIGHT / 2;
	game.addChild(titleScreen);
	// Add title text
	var titleText = new Text2('Defend Your Bastion!', {
		size: 120,
		fill: 0xFFFFFF
	});
	titleText.anchor.set(0.5, 0.5);
	titleText.y = -200;
	titleScreen.addChild(titleText);
	// Add a simple instruction text
	var instructionText = new Text2('Tap to Start', {
		size: 60,
		fill: 0xCCCCCC
	});
	instructionText.anchor.set(0.5, 0.5);
	instructionText.y = 100;
	titleScreen.addChild(instructionText);
	// Make the title screen interactive to start the game
	titleScreen.interactive = true;
	titleScreen.down = function () {
		startGame(); // Start the game when tapped
	};
	if (enemypediaButtonContainer) {
		enemypediaButtonContainer.visible = false; // Hide pedia button during title screen
	}
	// Pause game logic while title screen is active
	isUpgradePopupActive = true; // Reusing this flag to pause game logic
}
// Function to start the game
function startGame() {
	isGameStarted = true; // Set game started flag
	isUpgradePopupActive = false; // Unpause game logic
	if (titleScreen) {
		titleScreen.destroy();
		titleScreen = null;
	}
	// Create and add Enemypedia button
	if (!enemypediaButtonContainer) {
		enemypediaButtonContainer = new Container();
		var pediaButtonBgAsset = LK.getAsset('pedia_button_bg', {}); // Get asset for size
		var pediaButtonBg = enemypediaButtonContainer.attachAsset('pedia_button_bg', {
			anchorX: 0.5,
			anchorY: 0.5
		});
		var pediaButtonText = new Text2('Enemies', {
			size: 35,
			fill: 0xFFFFFF
		});
		pediaButtonText.anchor.set(0.5, 0.5);
		enemypediaButtonContainer.addChild(pediaButtonText);
		enemypediaButtonContainer.interactive = true;
		enemypediaButtonContainer.down = function () {
			if (!isUpgradePopupActive) {
				// Only open if upgrade popup isn't active
				showEnemypediaScreen();
			}
		};
		LK.gui.topRight.addChild(enemypediaButtonContainer);
		// Position it with padding from top-right corner
		enemypediaButtonContainer.x = -(pediaButtonBgAsset.width / 2 + 30);
		enemypediaButtonContainer.y = pediaButtonBgAsset.height / 2 + 30;
	}
	enemypediaButtonContainer.visible = true;
	// Reset game state if needed (LK might handle this on game start)
	// Play game music
	LK.playMusic('Gamemusic');
}
// Initially show the title screen
showTitleScreen();

===================================================================
--- original.js
+++ change.js
@@ -513,8 +513,216 @@
 		graphics.scale.set(1.3); // Slightly larger than normal shield
 	} //{11} // Modified original line identifier location
 	return self; // Return self for potential inheritance
 });
+var EnemypediaScreen = Container.expand(function () {
+	var self = Container.call(this);
+	self.currentPage = 0;
+	self.totalPages = enemyPediaData.length;
+	// Background
+	var bgAssetHeight = LK.getAsset('pedia_screen_bg', {}).height; // Get actual asset height for calculations
+	var bgAssetWidth = LK.getAsset('pedia_screen_bg', {}).width; // Get actual asset width
+	var bg = self.attachAsset('pedia_screen_bg', {
+		anchorX: 0.5,
+		anchorY: 0.5
+		// width and height are from asset default
+	});
+	self.x = GAME_WIDTH / 2;
+	self.y = GAME_HEIGHT / 2;
+	// Title
+	var titleText = new Text2('Enemypedia', {
+		size: 90,
+		fill: 0xFFFFFF
+	});
+	titleText.anchor.set(0.5, 0.5);
+	titleText.x = 0;
+	titleText.y = -(bgAssetHeight / 2) + 70; // Positioned from top of BG
+	self.addChild(titleText);
+	// Content container for enemy details
+	self.contentContainer = new Container();
+	// Position content container centrally between title and nav buttons
+	self.contentContainer.x = 0; // Centered horizontally
+	self.contentContainer.y = titleText.y + titleText.height / 2 + 20; // Below title
+	self.addChild(self.contentContainer);
+	// Navigation and Close Buttons
+	var navButtonYPos = bgAssetHeight / 2 - 60; // Positioned from bottom of BG
+	var closeButton = new Container();
+	var closeButtonBg = closeButton.attachAsset('pedia_nav_button_bg', {
+		anchorX: 0.5,
+		anchorY: 0.5,
+		color: 0xAA4444
+	});
+	var closeButtonText = new Text2('Close', {
+		size: 40,
+		fill: 0xFFFFFF
+	});
+	closeButtonText.anchor.set(0.5, 0.5);
+	closeButton.addChild(closeButtonText);
+	closeButton.x = 0;
+	closeButton.y = navButtonYPos;
+	closeButton.interactive = true;
+	closeButton.down = function () {
+		hideEnemypediaScreen();
+	};
+	self.addChild(closeButton);
+	var prevButton = new Container();
+	var prevButtonBg = prevButton.attachAsset('pedia_nav_button_bg', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	var prevButtonText = new Text2('Previous', {
+		size: 40,
+		fill: 0xFFFFFF
+	});
+	prevButtonText.anchor.set(0.5, 0.5);
+	prevButton.addChild(prevButtonText);
+	prevButton.x = -(closeButtonBg.width / 2 + prevButtonBg.width / 2 + 20); // Place left of close
+	prevButton.y = navButtonYPos;
+	prevButton.interactive = true;
+	prevButton.down = function () {
+		self.changePage(-1);
+	};
+	self.addChild(prevButton);
+	var nextButton = new Container();
+	var nextButtonBg = nextButton.attachAsset('pedia_nav_button_bg', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	var nextButtonText = new Text2('Next', {
+		size: 40,
+		fill: 0xFFFFFF
+	});
+	nextButtonText.anchor.set(0.5, 0.5);
+	nextButton.addChild(nextButtonText);
+	nextButton.x = closeButtonBg.width / 2 + nextButtonBg.width / 2 + 20; // Place right of close
+	nextButton.y = navButtonYPos;
+	nextButton.interactive = true;
+	nextButton.down = function () {
+		self.changePage(1);
+	};
+	self.addChild(nextButton);
+	self.pageNumberText = new Text2('', {
+		size: 30,
+		fill: 0xCCCCCC
+	});
+	self.pageNumberText.anchor.set(0.5, 0.5);
+	self.pageNumberText.x = 0;
+	self.pageNumberText.y = navButtonYPos - prevButtonBg.height / 2 - 25; // Above nav buttons
+	self.addChild(self.pageNumberText);
+	self.changePage = function (direction) {
+		if (self.totalPages === 0) return;
+		self.currentPage += direction;
+		if (self.currentPage < 0) self.currentPage = self.totalPages - 1;
+		if (self.currentPage >= self.totalPages) self.currentPage = 0;
+		self.renderPage();
+	};
+	self.renderPage = function () {
+		self.contentContainer.removeChildren();
+		if (self.totalPages === 0) {
+			var noDataText = new Text2('No enemy data available.', {
+				size: 50,
+				fill: 0xFFFFFF
+			});
+			noDataText.anchor.set(0.5, 0.5);
+			self.contentContainer.addChild(noDataText);
+			self.pageNumberText.setText('');
+			prevButton.visible = false;
+			nextButton.visible = false;
+			return;
+		}
+		prevButton.visible = true;
+		nextButton.visible = true;
+		var enemy = enemyPediaData[self.currentPage];
+		if (!enemy) return;
+		self.pageNumberText.setText('Page ' + (self.currentPage + 1) + ' of ' + self.totalPages);
+		var contentCurrentY = -(bgAssetHeight / 2) * 0.45; // Start Y for content, relative to contentContainer's center
+		var enemyImage = LK.getAsset(enemy.assetId, {
+			anchorX: 0.5,
+			anchorY: 0.5
+		});
+		var maxImgSize = 280;
+		var imgScale = 1;
+		if (enemyImage.width > maxImgSize || enemyImage.height > maxImgSize) {
+			imgScale = Math.min(maxImgSize / enemyImage.width, maxImgSize / enemyImage.height);
+		}
+		enemyImage.scale.set(imgScale);
+		enemyImage.x = 0; // Centered horizontally in contentContainer for now
+		enemyImage.y = contentCurrentY + enemyImage.height * imgScale / 2;
+		self.contentContainer.addChild(enemyImage);
+		contentCurrentY = enemyImage.y + enemyImage.height * imgScale / 2 + 30;
+		var nameText = new Text2(enemy.name, {
+			size: 60,
+			fill: 0xFFD700,
+			align: 'center',
+			wordWrap: true,
+			wordWrapWidth: bgAssetWidth * 0.8
+		});
+		nameText.anchor.set(0.5, 0);
+		nameText.x = 0;
+		nameText.y = contentCurrentY;
+		self.contentContainer.addChild(nameText);
+		contentCurrentY += nameText.height + 20;
+		var descText = new Text2(enemy.description, {
+			size: 38,
+			fill: 0xCCCCCC,
+			align: 'center',
+			style: {
+				wordWrap: true,
+				wordWrapWidth: bgAssetWidth * 0.75,
+				leading: 5
+			}
+		});
+		descText.anchor.set(0.5, 0);
+		descText.x = 0;
+		descText.y = contentCurrentY;
+		self.contentContainer.addChild(descText);
+		contentCurrentY += descText.height + 30;
+		var statsTitle = new Text2("Stats & Abilities:", {
+			size: 40,
+			fill: 0xDDDDFF,
+			align: 'center'
+		});
+		statsTitle.anchor.set(0.5, 0);
+		statsTitle.x = 0;
+		statsTitle.y = contentCurrentY;
+		self.contentContainer.addChild(statsTitle);
+		contentCurrentY += statsTitle.height + 15;
+		for (var i = 0; i < enemy.stats.length; i++) {
+			var statText = new Text2('- ' + enemy.stats[i], {
+				size: 32,
+				fill: 0xBBBBBB,
+				style: {
+					wordWrap: true,
+					wordWrapWidth: bgAssetWidth * 0.7,
+					leading: 5
+				}
+			});
+			statText.anchor.set(0.5, 0); // Center align stats text
+			statText.x = 0;
+			statText.y = contentCurrentY;
+			self.contentContainer.addChild(statText);
+			contentCurrentY += statText.height + 5; // Reduced spacing for stat lines
+		}
+		if (enemy.tags && enemy.tags.length > 0) {
+			contentCurrentY += 15; // Extra space before tags
+			var tagsText = new Text2('Tags: ' + enemy.tags.join(', '), {
+				size: 32,
+				fill: 0xAAAAFF,
+				align: 'center',
+				style: {
+					wordWrap: true,
+					wordWrapWidth: bgAssetWidth * 0.7
+				}
+			});
+			tagsText.anchor.set(0.5, 0);
+			tagsText.x = 0;
+			tagsText.y = contentCurrentY;
+			self.contentContainer.addChild(tagsText);
+		}
+	};
+	self.renderPage();
+	return self;
+});
 /** 
 	* Represents a Magic Ball projectile fired by a Wizard Tower.
 	* @param {number} angle - The angle in radians at which the magic ball is fired.
 	*/ 
@@ -877,8 +1085,91 @@
 var refinedProjectilesEnabled = false; // Flag for Refined Projectiles upgrade
 var greenSlowdownEnabled = false; // Flag for Green Slowdown upgrade
 var vikingAllies = []; // Array to hold VikingAlly instances
 var vikingAxes = []; // Array to hold VikingAxe instances
+// --- Enemypedia System ---
+var enemyPediaData = [{
+	name: 'Swordsman',
+	assetId: 'enemy',
+	description: 'A basic melee unit. The backbone of early waves.',
+	stats: ['Health: Low (scales with progression)', 'Speed: Moderate (scales)', 'Dodge: 0%'],
+	tags: []
+}, {
+	name: 'Knight',
+	assetId: 'knight',
+	description: 'A tougher melee unit, clad in armor. Appears from score 23.',
+	stats: ['Health: Medium (scales significantly)', 'Speed: Slightly Slower (scales)', 'Dodge: 0%', 'Special: Increased durability'],
+	tags: []
+}, {
+	name: 'Thief',
+	assetId: 'thief',
+	description: 'A fast and evasive unit. Appears from score 15.',
+	stats: ['Health: Very Low (1 base)', 'Speed: Very Fast (scales significantly)', 'Dodge: 10%', 'Special: High speed, chance to dodge attacks'],
+	tags: []
+}, {
+	name: 'Boss',
+	assetId: 'boss',
+	description: 'A formidable leader enemy appearing periodically (every 7th spawn after score 10). Very tough.',
+	stats: ['Health: Very High (scales massively with score)', 'Speed: Slow (scales)', 'Dodge: 0%', 'Special: Extremely durable, a major threat'],
+	tags: []
+}, {
+	name: 'Shield Enemy',
+	assetId: 'shield_enemy',
+	description: 'Carries a large shield, making it very resilient. Appears from score 30.',
+	stats: ['Health: High (scales significantly)', 'Speed: Very Slow (scales)', 'Dodge: 0%', 'Special: Absorbs a lot of damage'],
+	tags: []
+}, {
+	name: 'Wizard',
+	assetId: 'wizard_enemy',
+	description: 'A magical foe that can teleport to advance. Appears from score 25.',
+	stats: ['Health: Low (scales)', 'Speed: Slow, but teleports (movement speed scales)', 'Dodge: 0%', 'Special: Teleports forward periodically'],
+	tags: ['Green']
+}, {
+	name: 'Spearman',
+	assetId: 'spearman',
+	description: 'A common enemy unit. Appears from score 10.',
+	stats: ['Health: Low (scales)', 'Speed: Moderate (scales)', 'Dodge: 0%'],
+	tags: ['Green']
+}, {
+	name: 'War Elephant',
+	assetId: 'war_elephant',
+	description: 'A massive, slow behemoth that spawns Spearmen upon defeat. Appears from score 125.',
+	stats: ['Health: Extremely High (scales massively)', 'Speed: Extremely Slow (scales)', 'Dodge: 0%', 'Special: Spawns 5 Spearmen on death'],
+	tags: ['Green']
+}, {
+	name: 'Elite Knight',
+	assetId: 'elite_knight_asset',
+	description: 'A heavily armored knight, tougher than its standard counterpart. Appears from score 100.',
+	stats: ['Health: High (scales significantly)', 'Speed: Slower (scales)', 'Dodge: 0%', 'Special: Superior durability'],
+	tags: []
+}, {
+	name: 'Elite Shield',
+	assetId: 'elite_shield_asset',
+	description: 'The ultimate defensive unit with an incredibly tough shield. Appears from score 112.',
+	stats: ['Health: Very High (scales massively)', 'Speed: Extremely Slow (scales)', 'Dodge: 0%', 'Special: Unmatched resilience'],
+	tags: []
+}, {
+	name: 'Shaman',
+	assetId: 'shaman_enemy',
+	description: 'A mystical enemy that interferes with your reload. Appears from score 35.',
+	stats: ['Health: Low (scales)', 'Speed: Moderate (scales)', 'Dodge: 0%', 'Special: Periodically increases player arrow reload count'],
+	tags: ['Green']
+}, {
+	name: 'Hot Air Balloon',
+	assetId: 'hot_air_balloon_asset',
+	description: 'A slow aerial transport that deploys enemies upon destruction. Appears from score 154.',
+	stats: ['Health: Very Low (1 base)', 'Speed: Very Slow (scales)', 'Dodge: 0%', 'Special: Spawns 5 random non-green enemies on death'],
+	tags: []
+}, {
+	name: 'Dark Bowman',
+	assetId: 'dark_bowman_asset',
+	description: 'A sinister archer immune to arrows. Appears from score 55.',
+	stats: ['Health: Low (scales)', 'Speed: Fast (scales)', 'Dodge: 0%', 'Special: Immune to arrow projectiles'],
+	tags: ['Black']
+}];
+var enemypediaScreenInstance = null; // Instance of the EnemypediaScreen class
+var isEnemypediaActive = false; // Flag if the enemypedia is currently shown
+var enemypediaButtonContainer = null; // UI Button to open the pedia
 // --- Upgrade System ---
 var lastUpgradeScore = -1; // Score at which the last upgrade was offered
 var isUpgradePopupActive = false; // Flag indicating if the upgrade choice popup is visible
 var upgradePopup = null; // Container for the upgrade UI elements
@@ -934,8 +1225,28 @@
 	newViking.y = BASTION_Y - 100; // Position above the bastion line
 	game.addChild(newViking);
 	vikingAllies.push(newViking); // Add to the vikingAllies array
 }
+// --- Enemypedia Functions ---
+function showEnemypediaScreen() {
+	if (isEnemypediaActive || isUpgradePopupActive) return; // Don't show if already active or upgrade popup is on
+	isEnemypediaActive = true;
+	if (enemypediaScreenInstance) {
+		enemypediaScreenInstance.destroy();
+	}
+	enemypediaScreenInstance = new EnemypediaScreen();
+	game.addChild(enemypediaScreenInstance);
+	// Music handling can be added here if desired, similar to upgrade popup
+}
+function hideEnemypediaScreen() {
+	if (!isEnemypediaActive) return;
+	isEnemypediaActive = false;
+	if (enemypediaScreenInstance) {
+		enemypediaScreenInstance.destroy();
+		enemypediaScreenInstance = null;
+	}
+	// Music handling can be added here if desired
+}
 // Helper function placeholder for adding Swordsman
 function addSwordsman() {
 	// Create a swordsman tower at the bastion line
 	var tower = new Container();
@@ -1245,244 +1556,8 @@
 });
 ammoTxt.anchor.set(0.5, 0); // Anchor at the horizontal center, top edge.
 LK.gui.top.addChild(ammoTxt);
 ammoTxt.y = 180; // Position below the score text
-// --- Enemypedia ---
-var enemypediaButton;
-var enemypediaPopup = null;
-var enemyListContainer = null; // Container for enemy list items
-function showEnemypedia() {
-	isUpgradePopupActive = true; // Pause the game while enemypedia is open
-	enemypediaPopup = new Container();
-	enemypediaPopup.x = GAME_WIDTH / 2;
-	enemypediaPopup.y = GAME_HEIGHT / 2;
-	game.addChild(enemypediaPopup);
-	// Add a semi-transparent background overlay
-	var bg = enemypediaPopup.attachAsset('bastionLine', {
-		width: 1600,
-		height: 1000,
-		color: 0x000000,
-		anchorX: 0.5,
-		anchorY: 0.5,
-		alpha: 0.8
-	});
-	// Add title text
-	var title = new Text2('Enemypedia', {
-		size: 100,
-		fill: 0xFFFFFF
-	});
-	title.anchor.set(0.5, 0.5);
-	title.y = -450; // Position relative to popup center
-	enemypediaPopup.addChild(title);
-	// Add a close button
-	var closeButton = createCloseButton();
-	closeButton.x = 750; // Position relative to popup center
-	closeButton.y = -450;
-	enemypediaPopup.addChild(closeButton);
-	// Container for the list of enemies (scrollable potentially)
-	enemyListContainer = new Container();
-	enemyListContainer.y = -350; // Position below title
-	enemypediaPopup.addChild(enemyListContainer);
-	displayEnemyStats();
-}
-function hideEnemypedia() {
-	if (enemypediaPopup) {
-		enemypediaPopup.destroy();
-		enemypediaPopup = null;
-	}
-	isUpgradePopupActive = false; // Unpause the game
-}
-function createCloseButton() {
-	var buttonContainer = new Container();
-	var buttonBg = buttonContainer.attachAsset('bastionLine', {
-		width: 150,
-		height: 80,
-		color: 0xCC0000,
-		// Red color for close
-		anchorX: 0.5,
-		anchorY: 0.5
-	});
-	var buttonText = new Text2('X', {
-		size: 60,
-		fill: 0xFFFFFF
-	});
-	buttonText.anchor.set(0.5, 0.5);
-	buttonContainer.addChild(buttonText);
-	buttonContainer.interactive = true;
-	buttonContainer.down = function () {
-		hideEnemypedia();
-	};
-	return buttonContainer;
-}
-function displayEnemyStats() {
-	// Dummy data representing enemy types and their stats
-	var enemyData = [{
-		type: 'swordsman',
-		assetId: 'enemy',
-		description: 'Basic melee unit.',
-		baseHealth: 1,
-		baseSpeed: 3,
-		dodgeChance: 0
-	}, {
-		type: 'knight',
-		assetId: 'knight',
-		description: 'Slow, higher health unit.',
-		baseHealth: 5,
-		baseSpeed: 3 * 0.9,
-		dodgeChance: 0
-	}, {
-		type: 'thief',
-		assetId: 'thief',
-		description: 'Fast, low health unit with dodge chance.',
-		baseHealth: 1,
-		baseSpeed: 3 * 1.2,
-		dodgeChance: 0.1
-	}, {
-		type: 'boss',
-		assetId: 'boss',
-		description: 'Very high health boss.',
-		baseHealth: 5,
-		// Base health before scaling
-		baseSpeed: 3 * 0.7,
-		dodgeChance: 0
-	}, {
-		type: 'shield',
-		assetId: 'shield_enemy',
-		description: 'Very high health, very slow unit.',
-		baseHealth: 20,
-		baseSpeed: 3 * 0.5,
-		dodgeChance: 0
-	}, {
-		type: 'wizard',
-		assetId: 'wizard_enemy',
-		description: 'Teleports and has moderate speed.',
-		baseHealth: 2,
-		baseSpeed: 3 * 0.7,
-		dodgeChance: 0
-	}, {
-		type: 'spearman',
-		assetId: 'spearman',
-		description: 'Standard unit, often spawns from Elephants.',
-		baseHealth: 3,
-		baseSpeed: 3 * 1.0,
-		dodgeChance: 0
-	}, {
-		type: 'war_elephant',
-		assetId: 'war_elephant',
-		description: 'Extremely high health. Spawns spearmen on death.',
-		baseHealth: 500,
-		baseSpeed: 3 * 0.3,
-		dodgeChance: 0
-	}, {
-		type: 'elite_knight',
-		assetId: 'elite_knight_asset',
-		description: 'High health knight variant.',
-		baseHealth: 45,
-		baseSpeed: 3 * 0.85,
-		dodgeChance: 0
-	}, {
-		type: 'elite_shield',
-		assetId: 'elite_shield_asset',
-		description: 'Even higher health shield variant.',
-		baseHealth: 200,
-		baseSpeed: 3 * 0.4,
-		dodgeChance: 0
-	}, {
-		type: 'shaman',
-		assetId: 'shaman_enemy',
-		description: 'Reduces player ammo periodically.',
-		baseHealth: 2,
-		baseSpeed: 3 * 0.8,
-		dodgeChance: 0
-	}, {
-		type: 'hot_air_balloon',
-		assetId: 'hot_air_balloon_asset',
-		description: 'Very low health. Spawns random enemies on death.',
-		baseHealth: 1,
-		baseSpeed: 3 * 0.2,
-		dodgeChance: 0
-	}, {
-		type: 'dark_bowman',
-		assetId: 'dark_bowman_asset',
-		description: 'Immune to arrows. Higher health variant.',
-		baseHealth: 5,
-		baseSpeed: 3 * 1.1,
-		dodgeChance: 0
-	}];
-	var startY = 0;
-	var spacing = 150;
-	for (var i = 0; i < enemyData.length; i++) {
-		var enemyInfo = enemyData[i];
-		var enemyItem = new Container();
-		enemyItem.y = startY + i * spacing;
-		// Add enemy graphic (smaller representation)
-		var enemyGraphic = enemyItem.attachAsset(enemyInfo.assetId, {
-			anchorX: 0.5,
-			anchorY: 0.5,
-			scaleX: 0.5,
-			// Scale down for display
-			scaleY: 0.5,
-			x: -600 // Position to the left
-		});
-		// Add enemy name
-		var nameText = new Text2(enemyInfo.type.replace(/_/g, ' ').toUpperCase(), {
-			size: 40,
-			fill: 0xFFFFFF
-		});
-		nameText.anchor.set(0, 0.5); // Align left
-		nameText.x = -500;
-		enemyItem.addChild(nameText);
-		// Add description
-		var descText = new Text2('Description: ' + enemyInfo.description, {
-			size: 30,
-			fill: 0xCCCCCC,
-			wordWrap: true,
-			wordWrapWidth: 800 // Wrap text to fit width
-		});
-		descText.anchor.set(0, 0); // Align top-left
-		descText.x = -500;
-		descText.y = 30;
-		enemyItem.addChild(descText);
-		// Add stats
-		var statsText = new Text2('Health: ' + enemyInfo.baseHealth + ' | Speed: ' + enemyInfo.baseSpeed.toFixed(1) + ' | Dodge: ' + (enemyInfo.dodgeChance * 100).toFixed(0) + '%', {
-			size: 30,
-			fill: 0xAAAAAA
-		});
-		statsText.anchor.set(0, 0); // Align top-left
-		statsText.x = -500;
-		statsText.y = 70;
-		enemyItem.addChild(statsText);
-		enemyListContainer.addChild(enemyItem);
-	}
-}
-enemypediaButton = new Container();
-// Position the button (e.g., bottom right of GUI)
-enemypediaButton.x = GAME_WIDTH - 200; // Example X
-enemypediaButton.y = GAME_HEIGHT - 200; // Example Y
-// Add button background
-var buttonBg = enemypediaButton.attachAsset('bastionLine', {
-	// Reusing asset for shape
-	width: 300,
-	height: 100,
-	color: 0x444444,
-	// Grey color
-	anchorX: 0.5,
-	anchorY: 0.5
-});
-// Add button text
-var buttonText = new Text2('Enemypedia', {
-	size: 40,
-	fill: 0xFFFFFF
-});
-buttonText.anchor.set(0.5, 0.5);
-enemypediaButton.addChild(buttonText);
-// Make button interactive
-enemypediaButton.interactive = true;
-enemypediaButton.down = function () {
-	showEnemypedia();
-};
-// Add the button to the game scene (or GUI if needed)
-game.addChild(enemypediaButton);
 // --- Input Event Handlers ---
 // Handles touch/mouse press down event on the game area.
 game.down = function (x, y, obj) {
 	// Record the starting position of the drag in game coordinates.
@@ -1580,21 +1655,24 @@
 game.update = function () {
 	// --- Upgrade System Check ---
 	var currentScore = LK.getScore();
 	// Check if score reached a multiple of 10 and is higher than the last upgrade score
-	if (!isUpgradePopupActive && currentScore > 0 && currentScore % 10 === 0 && currentScore !== lastUpgradeScore) {
+	// Ensure Enemypedia is not active before showing upgrade popup
+	if (!isUpgradePopupActive && !isEnemypediaActive && currentScore > 0 && currentScore % 10 === 0 && currentScore !== lastUpgradeScore) {
 		lastUpgradeScore = currentScore; // Mark this score level as having triggered an upgrade offer
 		showUpgradePopup(); // Show the upgrade selection screen
 	}
-	// --- Pause Game Logic if Upgrade Popup is Active ---
-	if (isUpgradePopupActive) {
-		// Potential: Update UI animations if any
+	// --- Pause Game Logic if Upgrade Popup or Enemypedia is Active ---
+	if (isUpgradePopupActive || isEnemypediaActive) {
+		// Added isEnemypediaActive check
+		// Potential: Update UI animations if any for popups
 		return; // Skip the rest of the game update loop
 	}
 	// --- Resume Game Logic ---
-	if (isUpgradePopupActive) {
-		return; // Skip enemy movement and spawning if upgrade popup is active
-	}
+	// This redundant check can be removed due to the combined check above.
+	// if (isUpgradePopupActive) {
+	// return; // Skip enemy movement and spawning if upgrade popup is active
+	// }
 	// Decrease cooldown timer if active.
 	if (cooldownTimer > 0) {
 		cooldownTimer--;
 		ammoTxt.setText('Reloading...'); // Show reloading status
@@ -2142,8 +2220,11 @@
 	titleScreen.interactive = true;
 	titleScreen.down = function () {
 		startGame(); // Start the game when tapped
 	};
+	if (enemypediaButtonContainer) {
+		enemypediaButtonContainer.visible = false; // Hide pedia button during title screen
+	}
 	// Pause game logic while title screen is active
 	isUpgradePopupActive = true; // Reusing this flag to pause game logic
 }
 // Function to start the game
@@ -2153,8 +2234,35 @@
 	if (titleScreen) {
 		titleScreen.destroy();
 		titleScreen = null;
 	}
+	// Create and add Enemypedia button
+	if (!enemypediaButtonContainer) {
+		enemypediaButtonContainer = new Container();
+		var pediaButtonBgAsset = LK.getAsset('pedia_button_bg', {}); // Get asset for size
+		var pediaButtonBg = enemypediaButtonContainer.attachAsset('pedia_button_bg', {
+			anchorX: 0.5,
+			anchorY: 0.5
+		});
+		var pediaButtonText = new Text2('Enemies', {
+			size: 35,
+			fill: 0xFFFFFF
+		});
+		pediaButtonText.anchor.set(0.5, 0.5);
+		enemypediaButtonContainer.addChild(pediaButtonText);
+		enemypediaButtonContainer.interactive = true;
+		enemypediaButtonContainer.down = function () {
+			if (!isUpgradePopupActive) {
+				// Only open if upgrade popup isn't active
+				showEnemypediaScreen();
+			}
+		};
+		LK.gui.topRight.addChild(enemypediaButtonContainer);
+		// Position it with padding from top-right corner
+		enemypediaButtonContainer.x = -(pediaButtonBgAsset.width / 2 + 30);
+		enemypediaButtonContainer.y = pediaButtonBgAsset.height / 2 + 30;
+	}
+	enemypediaButtonContainer.visible = true;
 	// Reset game state if needed (LK might handle this on game start)
 	// Play game music
 	LK.playMusic('Gamemusic');
 }