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

/**** 
* Classes
****/ 
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.active = true;
	self.width = enemyGraphics.width;
	self.height = enemyGraphics.height;
	self.points = 10;
	self.shotChance = 0.005; // Chance per frame to shoot
	self.type = "basic"; // Default enemy type
	self.update = function () {
		// Enemy logic will be controlled by the formation
	};
	return self;
});
var ToughEnemy = Enemy.expand(function () {
	var self = Enemy.call(this);
	self.children[0].tint = 0x0000ff; // Blue tough enemy
	self.type = "tough";
	self.points = 25;
	self.shotChance = 0.005;
	self.health = 2; // Takes 2 hits to destroy
	// Override damage method
	self.damage = function () {
		self.health--;
		// Visual feedback for hit
		LK.effects.flashObject(self, 0xffffff, 100);
		if (self.health <= 0) {
			return true; // Enemy is destroyed
		}
		// Change appearance after hit
		self.children[0].alpha = 0.7;
		return false; // Enemy is still alive
	};
	return self;
});
// PowerUpManager has been moved to Classes section
var FastEnemy = Enemy.expand(function () {
	var self = Enemy.call(this);
	self.children[0].tint = 0xff0000; // Red fast enemy
	self.type = "fast";
	self.points = 15;
	self.shotChance = 0.008; // Higher chance to shoot
	self.speedMultiplier = 1.5; // Moves faster than other enemies
	// Override update to add custom behavior if needed
	var parentUpdate = self.update;
	self.update = function () {
		parentUpdate.call(self);
		// Additional fast enemy behavior can be added here
	};
	return self;
});
var BomberEnemy = Enemy.expand(function () {
	var self = Enemy.call(this);
	self.children[0].tint = 0xff00ff; // Purple bomber enemy
	self.type = "bomber";
	self.points = 20;
	self.shotChance = 0.004; // Lower chance to shoot, but shoots multiple bullets
	// Bomber enemies will release multiple bullets in a pattern
	self.fireBurst = function (shootFunction) {
		if (typeof shootFunction === 'function') {
			// Fire multiple shots in a spread pattern
			shootFunction(self);
			// Schedule additional shots with slight delay
			LK.setTimeout(function () {
				shootFunction(self);
			}, 150);
			LK.setTimeout(function () {
				shootFunction(self);
			}, 300);
		}
	};
	return self;
});
var BasicEnemy = Enemy.expand(function () {
	var self = Enemy.call(this);
	self.children[0].tint = 0x00ff00; // Green basic enemy
	self.type = "basic";
	self.points = 10;
	self.shotChance = 0.005;
	return self;
});
var EnemyBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('enemyBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 8; // Positive because it moves downward
	self.active = false;
	self.visible = false;
	self.width = bulletGraphics.width;
	self.height = bulletGraphics.height;
	self.reset = function (x, y) {
		self.x = x;
		self.y = y;
		self.active = true;
		self.visible = true;
	};
	self.update = function () {
		self.y += self.speed;
		// Deactivate when off screen
		if (self.y > 2732 + self.height) {
			self.active = false;
			self.visible = false;
		}
	};
	return self;
});
var PlayerBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('playerBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -15; // Negative because it moves upward
	self.active = false;
	self.visible = false;
	self.width = bulletGraphics.width;
	self.height = bulletGraphics.height;
	self.reset = function (x, y) {
		self.x = x;
		self.y = y;
		self.active = true;
		self.visible = true;
	};
	self.update = function () {
		self.y += self.speed;
		// Deactivate when off screen
		if (self.y < -self.height) {
			self.active = false;
			self.visible = false;
		}
	};
	return self;
});
var PlayerShip = Container.expand(function () {
	var self = Container.call(this);
	var shipGraphics = self.attachAsset('playerShip', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 12;
	self.width = shipGraphics.width;
	self.height = shipGraphics.height;
	self.fireRate = 15; // frames between shots
	self.lastShot = 0;
	self.alive = true;
	self.moveLeft = function () {
		self.x -= self.speed;
		if (self.x < self.width / 2) {
			self.x = self.width / 2;
		}
	};
	self.moveRight = function () {
		self.x += self.speed;
		if (self.x > 2048 - self.width / 2) {
			self.x = 2048 - self.width / 2;
		}
	};
	self.canShoot = function () {
		return self.lastShot <= 0;
	};
	self.resetShotTimer = function () {
		self.lastShot = self.fireRate;
	};
	self.update = function () {
		if (self.lastShot > 0) {
			self.lastShot--;
		}
	};
	return self;
});
var PowerUp = Container.expand(function () {
	var self = Container.call(this);
	// Default values
	self.type = "none";
	self.speed = 3;
	self.active = false;
	self.visible = false;
	self.width = 80;
	self.height = 80;
	// Create base graphics container that will hold the powerup visual
	var graphics = new Container();
	self.addChild(graphics);
	// Initialize with specific type
	self.init = function (type, x, y) {
		self.type = type;
		self.x = x;
		self.y = y;
		self.active = true;
		self.visible = true;
		// Clear previous graphics
		while (graphics.children.length > 0) {
			graphics.removeChild(graphics.children[0]);
		}
		// Create visuals based on type
		if (type === "extraLife") {
			var heart = LK.getAsset('shield', {
				anchorX: 0.5,
				anchorY: 0.5,
				tint: 0xff0000 // Red heart
			});
			graphics.addChild(heart);
		} else if (type === "weaponUpgrade") {
			var weapon = LK.getAsset('playerBullet', {
				anchorX: 0.5,
				anchorY: 0.5,
				tint: 0xffff00 // Yellow weapon upgrade
			});
			graphics.addChild(weapon);
		} else if (type === "shield") {
			var shield = LK.getAsset('shield', {
				anchorX: 0.5,
				anchorY: 0.5,
				tint: 0x00ffff // Cyan shield
			});
			graphics.addChild(shield);
		}
		// Apply a pulsing effect to make powerups stand out
		self.pulseEffect();
	};
	// Pulsing animation effect
	self.pulseEffect = function () {
		tween(graphics, {
			scaleX: 1.2,
			scaleY: 1.2
		}, {
			duration: 500,
			onFinish: function onComplete() {
				tween(graphics, {
					scaleX: 1.0,
					scaleY: 1.0
				}, {
					duration: 500,
					onFinish: self.pulseEffect
				});
			}
		});
	};
	// Update powerup position - move downward
	self.update = function () {
		if (self.active) {
			self.y += self.speed;
			// Deactivate when off screen
			if (self.y > GAME_HEIGHT + self.height) {
				self.active = false;
				self.visible = false;
			}
		}
	};
	return self;
});
var Shield = Container.expand(function () {
	var self = Container.call(this);
	var shieldGraphics = self.attachAsset('shield', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.health = 3;
	self.width = shieldGraphics.width;
	self.height = shieldGraphics.height;
	self.damage = function () {
		self.health--;
		shieldGraphics.alpha = self.health / 3;
		if (self.health <= 0) {
			self.active = false;
			self.visible = false;
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000022
});

/**** 
* Game Code
****/ 
// Game constants
var PowerUpManager = function PowerUpManager() {
	var powerups = [];
	var self = this;
	var maxPowerups = 10;
	// Probability settings
	self.dropChance = 0.2; // 20% chance an enemy drops a powerup
	// Create initial pool of powerups
	for (var i = 0; i < maxPowerups; i++) {
		var powerup = new PowerUp();
		powerup.visible = false;
		powerup.active = false;
		powerups.push(powerup);
		game.addChild(powerup);
	}
	// Get an inactive powerup from the pool
	self.getPowerUp = function () {
		for (var i = 0; i < powerups.length; i++) {
			if (!powerups[i].active) {
				return powerups[i];
			}
		}
		return null; // No powerups available
	};
	// Create a powerup at the given position with random type
	self.createPowerUp = function (x, y) {
		if (Math.random() > self.dropChance) return; // Random chance to drop
		var powerup = self.getPowerUp();
		if (!powerup) return;
		// Determine powerup type randomly
		var rand = Math.random();
		var type;
		if (rand < 0.3) {
			type = "extraLife";
		} else if (rand < 0.7) {
			type = "weaponUpgrade";
		} else {
			type = "shield";
		}
		powerup.init(type, x, y);
	};
	// Update all active powerups
	self.update = function () {
		for (var i = 0; i < powerups.length; i++) {
			if (powerups[i].active) {
				powerups[i].update();
			}
		}
	};
	// Check for collisions with player
	self.checkCollisions = function (player) {
		for (var i = 0; i < powerups.length; i++) {
			var powerup = powerups[i];
			if (powerup.active && player.alive && powerup.intersects(player)) {
				// Apply powerup effect
				self.applyPowerUp(powerup.type);
				// Deactivate powerup
				powerup.active = false;
				powerup.visible = false;
				// Visual feedback
				LK.effects.flashObject(player, 0x00ff00, 300);
			}
		}
	};
	// Apply powerup effects
	self.applyPowerUp = function (type) {
		if (type === "extraLife") {
			// Add extra life
			lives++;
			livesTxt.setText("Lives: " + lives);
		} else if (type === "weaponUpgrade") {
			// Temporary weapon upgrade (faster fire rate)
			var originalFireRate = player.fireRate;
			player.fireRate = Math.max(5, player.fireRate - 5); // Reduce fire rate (faster shots)
			// Reset after 10 seconds
			LK.setTimeout(function () {
				player.fireRate = originalFireRate;
			}, 10000);
		} else if (type === "shield") {
			// Create new shield for player
			var shield = new Shield();
			shield.x = player.x;
			shield.y = SHIELD_Y;
			shield.active = true;
			shields.push(shield);
			game.addChild(shield);
		}
	};
	// Get all powerups
	self.getAll = function () {
		return powerups;
	};
};
var BulletPool = function BulletPool(bulletType, maxSize) {
	var pool = [];
	var self = this;
	// Pre-create bullets
	for (var i = 0; i < maxSize; i++) {
		var bullet = new bulletType();
		bullet.visible = false;
		bullet.active = false;
		pool.push(bullet);
	}
	self.getBullet = function () {
		for (var i = 0; i < pool.length; i++) {
			if (!pool[i].active) {
				pool[i].active = true;
				pool[i].visible = true;
				return pool[i];
			}
		}
		return null; // No bullets available
	};
	self.getAll = function () {
		return pool;
	};
};
var GAME_WIDTH = 2048;
var GAME_HEIGHT = 2732;
var PLAYER_START_Y = GAME_HEIGHT - 200;
var SHIELD_Y = PLAYER_START_Y - 150;
var ENEMY_START_Y = 300;
var ENEMY_ROWS = 5;
var ENEMY_COLS = 10;
var ENEMY_PADDING = 20;
var ENEMIES_MOVE_DOWN_AMOUNT = 30;
var WAVE_SPEED_INCREASE = 0.2;
// Game state
var player;
var playerBulletPool;
var enemyBulletPool;
var powerUpManager;
var activePlayerBullets = 0;
var activeEnemyBullets = 0;
var enemies = [];
var shields = [];
var score = 0;
var lives = 3;
var wave = 1;
var enemiesDirection = 1; // 1 = right, -1 = left
var enemiesSpeed = 1;
var enemyMoveTimer = 0;
var enemyMoveInterval = 30; // Frames between enemy movement
var gameState = "playing"; // playing, gameover
var dragActive = false;
var dragStartX = 0;
var lastFrameTime = Date.now();
var frameTime = 0;
// UI elements
var scoreTxt;
var livesTxt;
var waveTxt;
// Initialize player
player = new PlayerShip();
player.x = GAME_WIDTH / 2;
player.y = PLAYER_START_Y;
game.addChild(player);
// Initialize bullet pools
playerBulletPool = new BulletPool(PlayerBullet, 20);
enemyBulletPool = new BulletPool(EnemyBullet, 50);
// Initialize power-up manager
powerUpManager = new PowerUpManager();
// Add all bullets to the game
var allPlayerBullets = playerBulletPool.getAll();
var allEnemyBullets = enemyBulletPool.getAll();
for (var i = 0; i < allPlayerBullets.length; i++) {
	game.addChild(allPlayerBullets[i]);
}
for (var i = 0; i < allEnemyBullets.length; i++) {
	game.addChild(allEnemyBullets[i]);
}
// Initialize shields
for (var i = 0; i < 3; i++) {
	var shield = new Shield();
	shield.x = GAME_WIDTH / 4 + GAME_WIDTH / 2 * (i / 2);
	shield.y = SHIELD_Y;
	shield.active = true;
	shields.push(shield);
	game.addChild(shield);
}
// Create UI
scoreTxt = new Text2('Score: 0', {
	size: 60,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0, 0);
scoreTxt.x = 20;
scoreTxt.y = 20;
LK.gui.addChild(scoreTxt);
livesTxt = new Text2('Lives: 3', {
	size: 60,
	fill: 0xFFFFFF
});
livesTxt.anchor.set(1, 0);
livesTxt.x = GAME_WIDTH - 20;
livesTxt.y = 20;
LK.gui.addChild(livesTxt);
waveTxt = new Text2('Wave: 1', {
	size: 60,
	fill: 0xFFFFFF
});
waveTxt.anchor.set(0.5, 0);
waveTxt.x = GAME_WIDTH / 2;
waveTxt.y = 20;
LK.gui.addChild(waveTxt);
// Create enemies
function createEnemies() {
	// Calculate total width of enemy formation
	var enemyWidth = new Enemy().width;
	var formationWidth = ENEMY_COLS * (enemyWidth + ENEMY_PADDING) - ENEMY_PADDING;
	var startX = (GAME_WIDTH - formationWidth) / 2 + enemyWidth / 2;
	// Enemy type distribution based on wave number
	// Higher waves have more advanced enemy types
	for (var row = 0; row < ENEMY_ROWS; row++) {
		for (var col = 0; col < ENEMY_COLS; col++) {
			var enemy;
			var rand = Math.random();
			// Different enemy types depending on row and wave number
			if (row === 0) {
				// Top row - tougher enemies in higher waves
				if (wave >= 3 && rand < 0.7) {
					enemy = new ToughEnemy();
				} else if (wave >= 2 && rand < 0.4) {
					enemy = new FastEnemy();
				} else {
					enemy = new BasicEnemy();
				}
			} else if (row === 1) {
				// Second row - more bombers in higher waves
				if (wave >= 3 && rand < 0.5) {
					enemy = new BomberEnemy();
				} else if (wave >= 2 && rand < 0.3) {
					enemy = new ToughEnemy();
				} else {
					enemy = new FastEnemy();
				}
			} else if (row === 2) {
				// Third row - mixed enemy types
				if (rand < 0.4) {
					enemy = new FastEnemy();
				} else if (rand < 0.7) {
					enemy = new BomberEnemy();
				} else {
					enemy = new BasicEnemy();
				}
			} else {
				// Lower rows - basic enemies with occasional fast ones
				if (rand < 0.3 * (wave / 2)) {
					enemy = new FastEnemy();
				} else {
					enemy = new BasicEnemy();
				}
			}
			enemy.x = startX + col * (enemy.width + ENEMY_PADDING);
			enemy.y = ENEMY_START_Y + row * (enemy.height + ENEMY_PADDING);
			enemy.row = row;
			enemy.col = col;
			// Modify points based on row position (higher rows worth more)
			enemy.points = Math.round(enemy.points * (1 + (ENEMY_ROWS - row) * 0.2));
			enemies.push(enemy);
			game.addChild(enemy);
		}
	}
}
createEnemies();
// Play background music
LK.playMusic('bgMusic', {
	loop: true
});
// Game control event handlers
game.down = function (x, y, obj) {
	dragActive = true;
	dragStartX = x;
};
game.up = function (x, y, obj) {
	dragActive = false;
};
game.move = function (x, y, obj) {
	if (dragActive && gameState === "playing") {
		// Move player based on drag
		var deltaX = x - dragStartX;
		if (Math.abs(deltaX) > 5) {
			// Threshold to prevent jitter
			if (deltaX > 0) {
				player.moveRight();
			} else {
				player.moveLeft();
			}
			dragStartX = x;
		}
	}
};
// Create player bullet
function shootPlayerBullet() {
	if (player.canShoot() && gameState === "playing") {
		var bullet = playerBulletPool.getBullet();
		if (bullet) {
			bullet.reset(player.x, player.y - player.height / 2);
			activePlayerBullets++;
			player.resetShotTimer();
			// Play shoot sound
			LK.getSound('playerShoot').play();
		}
	}
}
// Create enemy bullet
function shootEnemyBullet(enemy) {
	var bullet = enemyBulletPool.getBullet();
	if (bullet) {
		bullet.reset(enemy.x, enemy.y + enemy.height / 2);
		activeEnemyBullets++;
	}
}
// Check if formation needs to move down and change direction
function checkFormationBounds() {
	var moveDown = false;
	var minX = GAME_WIDTH;
	var maxX = 0;
	var enemyWidth = 0;
	// Check if there are any enemies before proceeding
	if (enemies.length === 0) {
		return false;
	}
	enemies.forEach(function (enemy) {
		if (enemy.x < minX) minX = enemy.x;
		if (enemy.x > maxX) maxX = enemy.x;
		enemyWidth = enemy.width; // Store width from any enemy for boundary checking
	});
	// Using enemyWidth which is now properly set from actual enemies
	if (minX < enemyWidth / 2 && enemiesDirection === -1 || maxX > GAME_WIDTH - enemyWidth / 2 && enemiesDirection === 1) {
		moveDown = true;
		enemiesDirection *= -1;
	}
	return moveDown;
}
// Move enemy formation
function moveEnemies() {
	var moveDown = checkFormationBounds();
	enemies.forEach(function (enemy) {
		if (moveDown) {
			enemy.y += ENEMIES_MOVE_DOWN_AMOUNT;
		}
		enemy.x += enemiesDirection * enemiesSpeed;
	});
}
// Check for collisions
function checkCollisions() {
	var allPlayerBullets = playerBulletPool.getAll();
	var allEnemyBullets = enemyBulletPool.getAll();
	// Player bullets vs enemies
	for (var i = 0; i < allPlayerBullets.length; i++) {
		var bullet = allPlayerBullets[i];
		if (!bullet.active) continue;
		// Check if bullet hits any enemy - using a more efficient method
		var hitEnemy = false;
		for (var j = enemies.length - 1; j >= 0; j--) {
			var enemy = enemies[j];
			if (bullet.intersects(enemy)) {
				var enemyDestroyed = true;
				var enemyX = enemy.x;
				var enemyY = enemy.y;
				var enemyType = enemy.type;
				// Handle tough enemies differently
				if (enemy.type === "tough" && typeof enemy.damage === "function") {
					enemyDestroyed = enemy.damage(); // Returns true if enemy is destroyed
				}
				if (enemyDestroyed) {
					// Enemy hit and destroyed
					score += enemy.points;
					scoreTxt.setText("Score: " + score);
					// Remove enemy
					game.removeChild(enemy);
					enemies.splice(j, 1);
					// Try to spawn a power-up at enemy position
					powerUpManager.createPowerUp(enemyX, enemyY);
					// Play explosion sound
					LK.getSound('enemyExplode').play();
					// Flash screen effect
					LK.effects.flashObject(game, 0xffffff, 100);
				}
				// Deactivate bullet regardless of whether enemy was destroyed
				bullet.active = false;
				bullet.visible = false;
				activePlayerBullets--;
				hitEnemy = true;
				break; // Bullet can only hit one enemy
			}
		}
		// Check if bullet hits any shield (only if it didn't hit an enemy)
		if (!hitEnemy && bullet.active) {
			for (var k = shields.length - 1; k >= 0; k--) {
				var shield = shields[k];
				if (shield.active && bullet.intersects(shield)) {
					// Shield hit by player bullet
					shield.damage();
					// Deactivate bullet
					bullet.active = false;
					bullet.visible = false;
					activePlayerBullets--;
					// Remove shield if destroyed
					if (!shield.active) {
						game.removeChild(shield);
						shields.splice(k, 1);
					}
					break;
				}
			}
		}
	}
	// Enemy bullets vs player and shields
	for (var i = 0; i < allEnemyBullets.length; i++) {
		var bullet = allEnemyBullets[i];
		if (!bullet.active) continue;
		// Check player collision
		if (bullet.intersects(player) && gameState === "playing") {
			// Player hit
			lives--;
			livesTxt.setText("Lives: " + lives);
			// Deactivate bullet
			bullet.active = false;
			bullet.visible = false;
			activeEnemyBullets--;
			// Play hit sound
			LK.getSound('playerHit').play();
			// Flash player effect
			LK.effects.flashObject(player, 0xff0000, 500);
			if (lives <= 0) {
				gameState = "gameover";
				LK.effects.flashScreen(0xff0000, 1000);
				LK.showGameOver();
			}
			continue;
		}
		// Check shield collision
		if (bullet.active) {
			for (var k = shields.length - 1; k >= 0; k--) {
				var shield = shields[k];
				if (shield.active && bullet.intersects(shield)) {
					// Shield hit by enemy bullet
					shield.damage();
					// Deactivate bullet
					bullet.active = false;
					bullet.visible = false;
					activeEnemyBullets--;
					if (!shield.active) {
						game.removeChild(shield);
						shields.splice(k, 1);
					}
					break;
				}
			}
		}
	}
	// Enemies vs bottom of screen
	// Only check this less frequently (every 10 frames)
	if (LK.ticks % 10 === 0) {
		for (var i = 0; i < enemies.length; i++) {
			if (enemies[i].y + enemies[i].height / 2 > player.y) {
				// Enemies reached player level - game over
				gameState = "gameover";
				LK.effects.flashScreen(0xff0000, 1000);
				LK.showGameOver();
				break;
			}
		}
	}
}
// Start next wave
function startNextWave() {
	wave++;
	waveTxt.setText("Wave: " + wave);
	// Display wave number with a nice animation
	var waveAnnouncement = new Text2('WAVE ' + wave, {
		size: 120,
		fill: 0xffff00
	});
	waveAnnouncement.anchor.set(0.5, 0.5);
	waveAnnouncement.x = GAME_WIDTH / 2;
	waveAnnouncement.y = GAME_HEIGHT / 2;
	waveAnnouncement.alpha = 0;
	game.addChild(waveAnnouncement);
	// Animate the wave announcement
	tween(waveAnnouncement, {
		alpha: 1
	}, {
		duration: 500,
		onFinish: function onFinish() {
			tween(waveAnnouncement, {
				alpha: 0,
				scaleX: 1.5,
				scaleY: 1.5
			}, {
				duration: 800,
				onFinish: function onFinish() {
					game.removeChild(waveAnnouncement);
				}
			});
		}
	});
	// Increase enemy speed with each wave
	enemiesSpeed += WAVE_SPEED_INCREASE;
	// Adjust powerup drop chance based on wave difficulty
	powerUpManager.dropChance = Math.min(0.35, 0.2 + wave * 0.03); // Increase drop chance slightly with waves
	// Adjust enemy move interval (enemies move faster in higher waves)
	enemyMoveInterval = Math.max(15, 30 - wave * 2);
	// Reset all enemy bullets without removing them
	var allEnemyBullets = enemyBulletPool.getAll();
	for (var i = 0; i < allEnemyBullets.length; i++) {
		if (allEnemyBullets[i].active) {
			allEnemyBullets[i].active = false;
			allEnemyBullets[i].visible = false;
		}
	}
	activeEnemyBullets = 0;
	// Create new enemy formation with more variety in higher waves
	createEnemies();
}
// With object pooling, we no longer need to clean up inactive objects
// Main game update loop
game.update = function () {
	// Calculate frame time for consistent speed regardless of framerate
	var currentTime = Date.now();
	frameTime = currentTime - lastFrameTime;
	lastFrameTime = currentTime;
	if (gameState === "playing") {
		// Update player
		player.update();
		// Auto shoot - less frequent check
		if (LK.ticks % 30 === 0) {
			shootPlayerBullet();
		}
		// Move enemies
		enemyMoveTimer++;
		if (enemyMoveTimer >= enemyMoveInterval) {
			moveEnemies();
			enemyMoveTimer = 0;
		}
		// Enemy shooting - only check every 10 frames
		if (enemies.length > 0 && LK.ticks % 10 === 0) {
			// Pre-calculate bottom enemies once per update
			var bottomEnemies = [];
			var columnsWithEnemies = {};
			// Find bottom enemies in each column more efficiently
			for (var i = 0; i < enemies.length; i++) {
				var enemy = enemies[i];
				var column = enemy.col;
				if (!columnsWithEnemies[column] || enemies[columnsWithEnemies[column]].row < enemy.row) {
					columnsWithEnemies[column] = i;
				}
			}
			// Get bottom enemies
			for (var col in columnsWithEnemies) {
				bottomEnemies.push(enemies[columnsWithEnemies[col]]);
			}
			// Random chance for enemies to shoot
			if (bottomEnemies.length > 0) {
				var maxShots = Math.min(3, bottomEnemies.length);
				var shotCount = 0;
				for (var i = 0; i < bottomEnemies.length && shotCount < maxShots; i++) {
					var enemy = bottomEnemies[i];
					if (Math.random() < enemy.shotChance * 2) {
						// Special handling for bomber enemies
						if (enemy.type === "bomber" && typeof enemy.fireBurst === "function") {
							enemy.fireBurst(shootEnemyBullet);
						} else {
							// Regular enemy shooting
							shootEnemyBullet(enemy);
						}
						shotCount++;
					}
				}
			}
		}
		// Update bullets from pools
		var allPlayerBullets = playerBulletPool.getAll();
		var allEnemyBullets = enemyBulletPool.getAll();
		// Only update active bullets
		for (var i = 0; i < allPlayerBullets.length; i++) {
			if (allPlayerBullets[i].active) {
				allPlayerBullets[i].update();
			}
		}
		for (var i = 0; i < allEnemyBullets.length; i++) {
			if (allEnemyBullets[i].active) {
				allEnemyBullets[i].update();
			}
		}
		// Update powerups and check for collisions
		powerUpManager.update();
		powerUpManager.checkCollisions(player);
		// Check collisions with optimized method
		checkCollisions();
		// Check if wave cleared
		if (enemies.length === 0) {
			startNextWave();
		}
	}
};

===================================================================
--- original.js
+++ change.js
@@ -17,13 +17,81 @@
 	self.width = enemyGraphics.width;
 	self.height = enemyGraphics.height;
 	self.points = 10;
 	self.shotChance = 0.005; // Chance per frame to shoot
+	self.type = "basic"; // Default enemy type
 	self.update = function () {
 		// Enemy logic will be controlled by the formation
 	};
 	return self;
 });
+var ToughEnemy = Enemy.expand(function () {
+	var self = Enemy.call(this);
+	self.children[0].tint = 0x0000ff; // Blue tough enemy
+	self.type = "tough";
+	self.points = 25;
+	self.shotChance = 0.005;
+	self.health = 2; // Takes 2 hits to destroy
+	// Override damage method
+	self.damage = function () {
+		self.health--;
+		// Visual feedback for hit
+		LK.effects.flashObject(self, 0xffffff, 100);
+		if (self.health <= 0) {
+			return true; // Enemy is destroyed
+		}
+		// Change appearance after hit
+		self.children[0].alpha = 0.7;
+		return false; // Enemy is still alive
+	};
+	return self;
+});
+// PowerUpManager has been moved to Classes section
+var FastEnemy = Enemy.expand(function () {
+	var self = Enemy.call(this);
+	self.children[0].tint = 0xff0000; // Red fast enemy
+	self.type = "fast";
+	self.points = 15;
+	self.shotChance = 0.008; // Higher chance to shoot
+	self.speedMultiplier = 1.5; // Moves faster than other enemies
+	// Override update to add custom behavior if needed
+	var parentUpdate = self.update;
+	self.update = function () {
+		parentUpdate.call(self);
+		// Additional fast enemy behavior can be added here
+	};
+	return self;
+});
+var BomberEnemy = Enemy.expand(function () {
+	var self = Enemy.call(this);
+	self.children[0].tint = 0xff00ff; // Purple bomber enemy
+	self.type = "bomber";
+	self.points = 20;
+	self.shotChance = 0.004; // Lower chance to shoot, but shoots multiple bullets
+	// Bomber enemies will release multiple bullets in a pattern
+	self.fireBurst = function (shootFunction) {
+		if (typeof shootFunction === 'function') {
+			// Fire multiple shots in a spread pattern
+			shootFunction(self);
+			// Schedule additional shots with slight delay
+			LK.setTimeout(function () {
+				shootFunction(self);
+			}, 150);
+			LK.setTimeout(function () {
+				shootFunction(self);
+			}, 300);
+		}
+	};
+	return self;
+});
+var BasicEnemy = Enemy.expand(function () {
+	var self = Enemy.call(this);
+	self.children[0].tint = 0x00ff00; // Green basic enemy
+	self.type = "basic";
+	self.points = 10;
+	self.shotChance = 0.005;
+	return self;
+});
 var EnemyBullet = Container.expand(function () {
 	var self = Container.call(this);
 	var bulletGraphics = self.attachAsset('enemyBullet', {
 		anchorX: 0.5,
@@ -434,22 +502,56 @@
 	// Calculate total width of enemy formation
 	var enemyWidth = new Enemy().width;
 	var formationWidth = ENEMY_COLS * (enemyWidth + ENEMY_PADDING) - ENEMY_PADDING;
 	var startX = (GAME_WIDTH - formationWidth) / 2 + enemyWidth / 2;
+	// Enemy type distribution based on wave number
+	// Higher waves have more advanced enemy types
 	for (var row = 0; row < ENEMY_ROWS; row++) {
 		for (var col = 0; col < ENEMY_COLS; col++) {
-			var enemy = new Enemy();
+			var enemy;
+			var rand = Math.random();
+			// Different enemy types depending on row and wave number
+			if (row === 0) {
+				// Top row - tougher enemies in higher waves
+				if (wave >= 3 && rand < 0.7) {
+					enemy = new ToughEnemy();
+				} else if (wave >= 2 && rand < 0.4) {
+					enemy = new FastEnemy();
+				} else {
+					enemy = new BasicEnemy();
+				}
+			} else if (row === 1) {
+				// Second row - more bombers in higher waves
+				if (wave >= 3 && rand < 0.5) {
+					enemy = new BomberEnemy();
+				} else if (wave >= 2 && rand < 0.3) {
+					enemy = new ToughEnemy();
+				} else {
+					enemy = new FastEnemy();
+				}
+			} else if (row === 2) {
+				// Third row - mixed enemy types
+				if (rand < 0.4) {
+					enemy = new FastEnemy();
+				} else if (rand < 0.7) {
+					enemy = new BomberEnemy();
+				} else {
+					enemy = new BasicEnemy();
+				}
+			} else {
+				// Lower rows - basic enemies with occasional fast ones
+				if (rand < 0.3 * (wave / 2)) {
+					enemy = new FastEnemy();
+				} else {
+					enemy = new BasicEnemy();
+				}
+			}
 			enemy.x = startX + col * (enemy.width + ENEMY_PADDING);
 			enemy.y = ENEMY_START_Y + row * (enemy.height + ENEMY_PADDING);
 			enemy.row = row;
 			enemy.col = col;
-			enemy.points = (ENEMY_ROWS - row) * 10; // Higher rows worth more points
-			// Different enemy colors based on row
-			if (row === 0) {
-				enemy.children[0].tint = 0xff0000; // Top row red
-			} else if (row === 1 || row === 2) {
-				enemy.children[0].tint = 0xff6600; // Middle rows orange
-			}
+			// Modify points based on row position (higher rows worth more)
+			enemy.points = Math.round(enemy.points * (1 + (ENEMY_ROWS - row) * 0.2));
 			enemies.push(enemy);
 			game.addChild(enemy);
 		}
 	}
@@ -547,27 +649,34 @@
 		var hitEnemy = false;
 		for (var j = enemies.length - 1; j >= 0; j--) {
 			var enemy = enemies[j];
 			if (bullet.intersects(enemy)) {
-				// Enemy hit
-				score += enemy.points;
-				scoreTxt.setText("Score: " + score);
-				// Create a powerup with a certain chance
+				var enemyDestroyed = true;
 				var enemyX = enemy.x;
 				var enemyY = enemy.y;
-				// Remove enemy
-				game.removeChild(enemy);
-				enemies.splice(j, 1);
-				// Try to spawn a power-up at enemy position
-				powerUpManager.createPowerUp(enemyX, enemyY);
-				// Deactivate bullet
+				var enemyType = enemy.type;
+				// Handle tough enemies differently
+				if (enemy.type === "tough" && typeof enemy.damage === "function") {
+					enemyDestroyed = enemy.damage(); // Returns true if enemy is destroyed
+				}
+				if (enemyDestroyed) {
+					// Enemy hit and destroyed
+					score += enemy.points;
+					scoreTxt.setText("Score: " + score);
+					// Remove enemy
+					game.removeChild(enemy);
+					enemies.splice(j, 1);
+					// Try to spawn a power-up at enemy position
+					powerUpManager.createPowerUp(enemyX, enemyY);
+					// Play explosion sound
+					LK.getSound('enemyExplode').play();
+					// Flash screen effect
+					LK.effects.flashObject(game, 0xffffff, 100);
+				}
+				// Deactivate bullet regardless of whether enemy was destroyed
 				bullet.active = false;
 				bullet.visible = false;
 				activePlayerBullets--;
-				// Play explosion sound
-				LK.getSound('enemyExplode').play();
-				// Flash screen effect
-				LK.effects.flashObject(enemy, 0xffffff, 300);
 				hitEnemy = true;
 				break; // Bullet can only hit one enemy
 			}
 		}
@@ -653,12 +762,42 @@
 // Start next wave
 function startNextWave() {
 	wave++;
 	waveTxt.setText("Wave: " + wave);
+	// Display wave number with a nice animation
+	var waveAnnouncement = new Text2('WAVE ' + wave, {
+		size: 120,
+		fill: 0xffff00
+	});
+	waveAnnouncement.anchor.set(0.5, 0.5);
+	waveAnnouncement.x = GAME_WIDTH / 2;
+	waveAnnouncement.y = GAME_HEIGHT / 2;
+	waveAnnouncement.alpha = 0;
+	game.addChild(waveAnnouncement);
+	// Animate the wave announcement
+	tween(waveAnnouncement, {
+		alpha: 1
+	}, {
+		duration: 500,
+		onFinish: function onFinish() {
+			tween(waveAnnouncement, {
+				alpha: 0,
+				scaleX: 1.5,
+				scaleY: 1.5
+			}, {
+				duration: 800,
+				onFinish: function onFinish() {
+					game.removeChild(waveAnnouncement);
+				}
+			});
+		}
+	});
 	// Increase enemy speed with each wave
 	enemiesSpeed += WAVE_SPEED_INCREASE;
 	// Adjust powerup drop chance based on wave difficulty
 	powerUpManager.dropChance = Math.min(0.35, 0.2 + wave * 0.03); // Increase drop chance slightly with waves
+	// Adjust enemy move interval (enemies move faster in higher waves)
+	enemyMoveInterval = Math.max(15, 30 - wave * 2);
 	// Reset all enemy bullets without removing them
 	var allEnemyBullets = enemyBulletPool.getAll();
 	for (var i = 0; i < allEnemyBullets.length; i++) {
 		if (allEnemyBullets[i].active) {
@@ -666,9 +805,9 @@
 			allEnemyBullets[i].visible = false;
 		}
 	}
 	activeEnemyBullets = 0;
-	// Create new enemy formation
+	// Create new enemy formation with more variety in higher waves
 	createEnemies();
 }
 // With object pooling, we no longer need to clean up inactive objects
 // Main game update loop
@@ -708,15 +847,20 @@
 				bottomEnemies.push(enemies[columnsWithEnemies[col]]);
 			}
 			// Random chance for enemies to shoot
 			if (bottomEnemies.length > 0) {
-				// Limit number of shots per frame
 				var maxShots = Math.min(3, bottomEnemies.length);
 				var shotCount = 0;
 				for (var i = 0; i < bottomEnemies.length && shotCount < maxShots; i++) {
-					if (Math.random() < bottomEnemies[i].shotChance * 2) {
-						// Adjusted for less frequent checks
-						shootEnemyBullet(bottomEnemies[i]);
+					var enemy = bottomEnemies[i];
+					if (Math.random() < enemy.shotChance * 2) {
+						// Special handling for bomber enemies
+						if (enemy.type === "bomber" && typeof enemy.fireBurst === "function") {
+							enemy.fireBurst(shootEnemyBullet);
+						} else {
+							// Regular enemy shooting
+							shootEnemyBullet(enemy);
+						}
 						shotCount++;
 					}
 				}
 			}
@@ -744,6 +888,5 @@
 		if (enemies.length === 0) {
 			startNextWave();
 		}
 	}
-};
-// PowerUpManager has been moved to Classes section
\ No newline at end of file
+};
\ No newline at end of file