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

/**** 
* Classes
****/ 
var BossEnemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('jefe', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 2,
		scaleY: 2
	});
	self.speed = -1; // Very slow
	self.lastX = self.x; // Initialize in constructor
	self.lastY = self.y; // Initialize in constructor
	self.shootCooldown = 0;
	self.health = 10; // Takes 10 hits to destroy
	self.verticalSpeed = 2;
	self.verticalDirection = 1;
	self.isFirstFrame = true; // Initialization flag
	self.update = function () {
		// Skip first frame logic to ensure proper initialization
		if (self.isFirstFrame) {
			self.isFirstFrame = false;
			return; // Skip first frame to avoid premature trigger
		}
		// Move enemy left
		self.x += self.speed;
		// Move vertically up and down
		self.y += self.verticalSpeed * self.verticalDirection;
		// Calculate bounds based on scaled boss height to keep it fully visible
		var margin = 50; // Safety margin
		var scaledHeight = 126 * 2; // Original height * scale factor
		var topBound = scaledHeight / 2 + margin;
		var bottomBound = 2732 - scaledHeight / 2 - margin;
		if (self.y <= topBound || self.y >= bottomBound) {
			self.verticalDirection *= -1;
		}
		// Update shooting cooldown
		if (self.shootCooldown > 0) {
			self.shootCooldown--;
		}
		// Update last values for next frame
		self.lastX = self.x;
		self.lastY = self.y;
	};
	self.canShoot = function () {
		return self.shootCooldown <= 0;
	};
	self.shoot = function () {
		if (self.canShoot()) {
			self.shootCooldown = 60; // Slower shooting
			return true;
		}
		return false;
	};
	self.takeDamage = function () {
		self.health--;
		// Visual feedback for taking damage
		enemyGraphics.alpha = Math.max(0.3, Math.min(1.0, 0.3 + self.health / 10 * 0.7));
		return self.health <= 0;
	};
	self.cleanup = function () {
		// Clear any references and reset properties
		self.lastX = undefined;
		self.lastY = undefined;
		self.shootCooldown = 0;
		self.speed = 0;
		self.health = 0;
		self.verticalSpeed = 0;
		self.verticalDirection = 1;
		self.isFirstFrame = true;
		// Remove from parent if still attached
		if (self.parent) {
			self.parent.removeChild(self);
		}
	};
	return self;
});
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 8;
	self.lastX = self.x; // Initialize in constructor
	self.lastY = self.y; // Initialize in constructor
	self.directionX = 1; // Default horizontal direction
	self.directionY = 0; // Default no vertical movement
	self.update = function () {
		// Null checks for safety
		if (self.lastX === null || self.lastX === undefined) self.lastX = self.x;
		if (self.lastY === null || self.lastY === undefined) self.lastY = self.y;
		// Set bullet rotation based on direction
		var angle = Math.atan2(self.directionY, self.directionX);
		bulletGraphics.rotation = angle;
		self.x += self.speed * self.directionX;
		self.y += self.speed * self.directionY;
		self.lastX = self.x;
		self.lastY = self.y;
	};
	self.cleanup = function () {
		// Clear any references and reset properties
		self.lastX = undefined;
		self.lastY = undefined;
		self.speed = 0;
		self.directionX = 0;
		self.directionY = 0;
		// Remove from parent if still attached
		if (self.parent) {
			self.parent.removeChild(self);
		}
	};
	return self;
});
var CharacterSelectionScreen = Container.expand(function () {
	var self = Container.call(this);
	// Create title text
	var titleText = new Text2('SELECCIÓN DE PERSONAJE', {
		size: 140,
		fill: 0xFFFFFF
	});
	titleText.anchor.set(0.5, 0.5);
	titleText.x = 2048 / 2;
	titleText.y = 400;
	self.addChild(titleText);
	// Create character images
	var player1Image = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 2048 / 2 - 600,
		y: 1000,
		scaleX: 1.5,
		scaleY: 1.5
	});
	var player2Image = self.attachAsset('jugador2', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 2048 / 2 - 200,
		y: 1000,
		scaleX: 1.5,
		scaleY: 1.5
	});
	var player3Image = self.attachAsset('jugador3', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 2048 / 2 + 200,
		y: 1000,
		scaleX: 1.5,
		scaleY: 1.5
	});
	var player4Image = self.attachAsset('jugador4', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 2048 / 2 + 600,
		y: 1000,
		scaleX: 1.5,
		scaleY: 1.5
	});
	// Create play button image
	var playImage = self.attachAsset('jugar', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 2048 / 2,
		y: 1400,
		scaleX: 2,
		scaleY: 2
	});
	// Store references for event handling
	self.player1Image = player1Image;
	self.player2Image = player2Image;
	self.player3Image = player3Image;
	self.player4Image = player4Image;
	self.playButton = playImage;
	self.selectedCharacter = 'player'; // Default selection
	return self;
});
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -3;
	self.lastX = self.x; // Initialize in constructor
	self.shootCooldown = 0;
	self.isFirstFrame = true; // Initialization flag
	self.update = function () {
		// Skip first frame logic to ensure proper initialization
		if (self.isFirstFrame) {
			self.isFirstFrame = false;
			return; // Skip first frame to avoid premature trigger
		}
		// Move enemy left
		self.x += self.speed;
		// Update shooting cooldown
		if (self.shootCooldown > 0) {
			self.shootCooldown--;
		}
		// Update lastX for next frame
		self.lastX = self.x;
	};
	self.canShoot = function () {
		return self.shootCooldown <= 0;
	};
	self.shoot = function () {
		if (self.canShoot()) {
			self.shootCooldown = 180; // 3 second cooldown
			return true;
		}
		return false;
	};
	self.cleanup = function () {
		// Clear any references and reset properties
		self.lastX = undefined;
		self.shootCooldown = 0;
		self.speed = 0;
		self.isFirstFrame = true;
		// Remove from parent if still attached
		if (self.parent) {
			self.parent.removeChild(self);
		}
	};
	return self;
});
var EnemyBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 6;
	self.lastX = self.x; // Initialize in constructor
	self.lastY = self.y; // Initialize in constructor
	self.directionX = -1; // Default moving left
	self.directionY = 0; // Default no vertical movement
	self.update = function () {
		// Null checks for safety
		if (self.lastX === null || self.lastX === undefined) self.lastX = self.x;
		if (self.lastY === null || self.lastY === undefined) self.lastY = self.y;
		// Set bullet rotation based on direction
		var angle = Math.atan2(self.directionY, self.directionX);
		bulletGraphics.rotation = angle;
		self.x += self.speed * self.directionX;
		self.y += self.speed * self.directionY;
		self.lastX = self.x;
		self.lastY = self.y;
	};
	self.cleanup = function () {
		// Clear any references and reset properties
		self.lastX = undefined;
		self.lastY = undefined;
		self.speed = 0;
		self.directionX = 0;
		self.directionY = 0;
		// Remove from parent if still attached
		if (self.parent) {
			self.parent.removeChild(self);
		}
	};
	return self;
});
var FastEnemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('enemigorapido', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -6; // Faster than regular enemy
	self.lastX = self.x; // Initialize in constructor
	self.shootCooldown = 0;
	self.isFirstFrame = true; // Initialization flag
	self.update = function () {
		// Skip first frame logic to ensure proper initialization
		if (self.isFirstFrame) {
			self.isFirstFrame = false;
			return; // Skip first frame to avoid premature trigger
		}
		// Move enemy left
		self.x += self.speed;
		// Update shooting cooldown
		if (self.shootCooldown > 0) {
			self.shootCooldown--;
		}
		// Update lastX for next frame
		self.lastX = self.x;
	};
	self.canShoot = function () {
		return self.shootCooldown <= 0;
	};
	self.shoot = function () {
		if (self.canShoot()) {
			self.shootCooldown = 120; // 2 second cooldown
			return true;
		}
		return false;
	};
	self.cleanup = function () {
		// Clear any references and reset properties
		self.lastX = undefined;
		self.shootCooldown = 0;
		self.speed = 0;
		self.isFirstFrame = true;
		// Remove from parent if still attached
		if (self.parent) {
			self.parent.removeChild(self);
		}
	};
	return self;
});
var HealthPowerup = Container.expand(function () {
	var self = Container.call(this);
	var powerupGraphics = self.attachAsset('healthPowerup', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -2;
	self.lastX = self.x;
	self.lastY = self.y;
	self.bobOffset = 0;
	self.isFirstFrame = true;
	self.update = function () {
		if (self.isFirstFrame) {
			self.isFirstFrame = false;
			return;
		}
		// Move left
		self.x += self.speed;
		// Bob up and down for visual appeal
		self.bobOffset += 0.1;
		powerupGraphics.y = Math.sin(self.bobOffset) * 10;
		// Gentle rotation
		powerupGraphics.rotation += 0.02;
		self.lastX = self.x;
		self.lastY = self.y;
	};
	self.cleanup = function () {
		self.lastX = undefined;
		self.lastY = undefined;
		self.speed = 0;
		self.isFirstFrame = true;
		if (self.parent) {
			self.parent.removeChild(self);
		}
	};
	return self;
});
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.attachAsset(selectedPlayerAsset, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.shootCooldown = 0;
	self.update = function () {
		if (self.shootCooldown > 0) {
			self.shootCooldown--;
		}
		// Update shield visual effect
		if (playerShieldTime > 0) {
			// Pulsing blue tint when shielded
			var pulse = Math.sin(LK.ticks * 0.3) * 0.3 + 0.7;
			playerGraphics.tint = 0x4488ff;
			playerGraphics.alpha = pulse;
		} else {
			// Normal appearance
			playerGraphics.tint = 0xffffff;
			playerGraphics.alpha = 1.0;
		}
	};
	self.canShoot = function () {
		return self.shootCooldown <= 0;
	};
	self.shoot = function () {
		if (self.canShoot()) {
			// Faster shooting with weapon upgrades
			var cooldown = Math.max(5, 10 - (playerWeaponLevel - 1) * 2);
			self.shootCooldown = cooldown;
			return playerWeaponLevel; // Return weapon level for multi-shot
		}
		return 0;
	};
	return self;
});
var ShieldEnemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('enemigoescudo', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -2; // Slower than regular enemy
	self.lastX = self.x; // Initialize in constructor
	self.shootCooldown = 0;
	self.health = 3; // Takes 3 hits to destroy
	self.isFirstFrame = true; // Initialization flag
	self.update = function () {
		// Skip first frame logic to ensure proper initialization
		if (self.isFirstFrame) {
			self.isFirstFrame = false;
			return; // Skip first frame to avoid premature trigger
		}
		// Move enemy left
		self.x += self.speed;
		// Update shooting cooldown
		if (self.shootCooldown > 0) {
			self.shootCooldown--;
		}
		// Update lastX for next frame
		self.lastX = self.x;
	};
	self.canShoot = function () {
		return self.shootCooldown <= 0;
	};
	self.shoot = function () {
		if (self.canShoot()) {
			self.shootCooldown = 150; // Much slower shooting
			return true;
		}
		return false;
	};
	self.takeDamage = function () {
		self.health--;
		// Visual feedback for taking damage
		enemyGraphics.alpha = Math.max(0.5, Math.min(1.0, 0.5 + self.health / 3 * 0.5));
		return self.health <= 0;
	};
	self.cleanup = function () {
		// Clear any references and reset properties
		self.lastX = undefined;
		self.shootCooldown = 0;
		self.speed = 0;
		self.health = 0;
		self.isFirstFrame = true;
		// Remove from parent if still attached
		if (self.parent) {
			self.parent.removeChild(self);
		}
	};
	return self;
});
var ShieldPowerup = Container.expand(function () {
	var self = Container.call(this);
	var powerupGraphics = self.attachAsset('shieldPowerup', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -2;
	self.lastX = self.x;
	self.lastY = self.y;
	self.bobOffset = 0;
	self.isFirstFrame = true;
	self.update = function () {
		if (self.isFirstFrame) {
			self.isFirstFrame = false;
			return;
		}
		// Move left
		self.x += self.speed;
		// Bob up and down for visual appeal
		self.bobOffset += 0.15;
		powerupGraphics.y = Math.sin(self.bobOffset) * 15;
		// Pulsing effect
		var pulse = Math.sin(self.bobOffset * 2) * 0.2 + 1.0;
		powerupGraphics.scaleX = pulse;
		powerupGraphics.scaleY = pulse;
		self.lastX = self.x;
		self.lastY = self.y;
	};
	self.cleanup = function () {
		self.lastX = undefined;
		self.lastY = undefined;
		self.speed = 0;
		self.isFirstFrame = true;
		if (self.parent) {
			self.parent.removeChild(self);
		}
	};
	return self;
});
var StartScreen = Container.expand(function () {
	var self = Container.call(this);
	// Create title text
	var titleText = new Text2('SPACE SHOOTER', {
		size: 180,
		fill: 0xFFFFFF
	});
	titleText.anchor.set(0.5, 0.5);
	titleText.x = 2048 / 2;
	titleText.y = 2732 / 2 - 300;
	self.addChild(titleText);
	// Create play button image
	var playImage = self.attachAsset('jugar', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 2048 / 2,
		y: 2732 / 2 + 50,
		scaleX: 2,
		scaleY: 2
	});
	// Create character selection button image
	var characterImage = self.attachAsset('seleccionpersonaje', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 2048 / 2,
		y: 2732 / 2 + 450,
		scaleX: 2,
		scaleY: 2
	});
	// Store button references for event handling
	self.playButton = playImage;
	self.characterButton = characterImage;
	return self;
});
var WeaponPowerup = Container.expand(function () {
	var self = Container.call(this);
	var powerupGraphics = self.attachAsset('weaponPowerup', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -2;
	self.lastX = self.x;
	self.lastY = self.y;
	self.bobOffset = 0;
	self.isFirstFrame = true;
	self.update = function () {
		if (self.isFirstFrame) {
			self.isFirstFrame = false;
			return;
		}
		// Move left
		self.x += self.speed;
		// Bob up and down for visual appeal
		self.bobOffset += 0.12;
		powerupGraphics.y = Math.sin(self.bobOffset) * 12;
		// Spinning effect
		powerupGraphics.rotation += 0.05;
		self.lastX = self.x;
		self.lastY = self.y;
	};
	self.cleanup = function () {
		self.lastX = undefined;
		self.lastY = undefined;
		self.speed = 0;
		self.isFirstFrame = true;
		if (self.parent) {
			self.parent.removeChild(self);
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x1a1a2e
});

/**** 
* Game Code
****/ 
// Game state variables
var gameStarted = false;
var startScreen = null;
var characterSelectionScreen = null;
var selectedPlayerAsset = 'player'; // Track which character asset to use
var player = null;
var enemies = [];
var fastEnemies = [];
var shieldEnemies = [];
var bossEnemies = [];
var bullets = [];
var enemyBullets = [];
var enemySpawnTimer = 0;
var enemySpawnRate = 120; // Start spawning every 2 seconds (120 frames)
var difficultyTimer = 0;
var playerLives = 3;
var playerShieldTime = 0; // Shield duration in frames
var playerWeaponLevel = 1; // Weapon upgrade level (1-3)
var playerWeaponTime = 0; // Weapon upgrade duration in frames
// Power-up arrays
var healthPowerups = [];
var shieldPowerups = [];
var weaponPowerups = [];
var powerupSpawnTimer = 0;
var powerupSpawnRate = 300; // Spawn every 5 seconds
var enemiesEscaped = 0; // Track how many enemies have escaped
var bossTimer = 0; // Track time for boss battle cycles (2 minutes = 7200 frames)
var bossPhase = false; // Track if we're in boss phase
var bossesSpawned = 0; // Track how many bosses have been spawned in current phase
// Arrays to track objects marked for removal (using object references for safer iteration)
var bulletsToRemove = [];
var healthPowerupsToRemove = [];
var shieldPowerupsToRemove = [];
var weaponPowerupsToRemove = [];
var enemyBulletsToRemove = [];
var enemiesToRemove = [];
var fastEnemiesToRemove = [];
var shieldEnemiesToRemove = [];
var bossEnemiesToRemove = [];
var isDragging = false;
var scoreTxt = null;
var livesTxt = null;
var livesNumberTxt = null;
// Add background image
var backgroundImage = game.attachAsset('fondo', {
	anchorX: 0,
	anchorY: 0,
	x: 0,
	y: 0
});
// Initialize start screen
startScreen = new StartScreen();
game.addChild(startScreen);
function showCharacterSelection() {
	// Remove start screen
	if (startScreen && startScreen.parent) {
		startScreen.destroy();
		startScreen = null;
	}
	// Show character selection screen
	characterSelectionScreen = new CharacterSelectionScreen();
	game.addChild(characterSelectionScreen);
}
function startGame() {
	gameStarted = true;
	// Remove start screen
	if (startScreen && startScreen.parent) {
		startScreen.destroy();
		startScreen = null;
	}
	// Remove character selection screen
	if (characterSelectionScreen && characterSelectionScreen.parent) {
		characterSelectionScreen.destroy();
		characterSelectionScreen = null;
	}
	// Initialize player with selected character asset
	player = new Player();
	player.x = 150;
	player.y = 2732 - 150; // Near bottom with some margin
	game.addChild(player);
	// Create score display
	scoreTxt = new Text2('0', {
		size: 100,
		fill: 0xFFFFFF
	});
	scoreTxt.anchor.set(0.5, 0);
	LK.gui.top.addChild(scoreTxt);
	scoreTxt.setText(LK.getScore());
	// Create lives display with image
	livesTxt = LK.getAsset('vidas', {
		anchorX: 0,
		anchorY: 0,
		x: 120,
		y: 20
	});
	LK.gui.topLeft.addChild(livesTxt);
	// Create lives number display
	livesNumberTxt = new Text2(playerLives.toString(), {
		size: 80,
		fill: 0xFFFFFF
	});
	livesNumberTxt.anchor.set(0, 0.5);
	livesNumberTxt.x = 330; // Position to the right of vidas image
	livesNumberTxt.y = 77; // Center vertically with vidas image
	LK.gui.topLeft.addChild(livesNumberTxt);
}
// Touch/mouse down - handle start screen or game play
game.down = function (x, y, obj) {
	if (!gameStarted) {
		// Handle start screen
		if (startScreen) {
			// Check if play button was clicked
			if (startScreen.playButton) {
				var deltaX = x - startScreen.playButton.x;
				var deltaY = y - startScreen.playButton.y;
				var distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
				if (distance < 150) {
					// Button click radius
					startGame();
					return;
				}
			}
			// Check if character selection button was clicked
			if (startScreen.characterButton) {
				var deltaX = x - startScreen.characterButton.x;
				var deltaY = y - startScreen.characterButton.y;
				var distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
				if (distance < 200) {
					// Button click radius
					showCharacterSelection();
					return;
				}
			}
			return;
		}
		// Handle character selection screen
		if (characterSelectionScreen) {
			// Check character image clicks
			if (characterSelectionScreen.player1Image) {
				var deltaX = x - characterSelectionScreen.player1Image.x;
				var deltaY = y - characterSelectionScreen.player1Image.y;
				var distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
				if (distance < 150) {
					selectedPlayerAsset = 'player';
					characterSelectionScreen.selectedCharacter = 'player';
					return;
				}
			}
			if (characterSelectionScreen.player2Image) {
				var deltaX = x - characterSelectionScreen.player2Image.x;
				var deltaY = y - characterSelectionScreen.player2Image.y;
				var distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
				if (distance < 150) {
					selectedPlayerAsset = 'jugador2';
					characterSelectionScreen.selectedCharacter = 'jugador2';
					return;
				}
			}
			if (characterSelectionScreen.player3Image) {
				var deltaX = x - characterSelectionScreen.player3Image.x;
				var deltaY = y - characterSelectionScreen.player3Image.y;
				var distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
				if (distance < 150) {
					selectedPlayerAsset = 'jugador3';
					characterSelectionScreen.selectedCharacter = 'jugador3';
					return;
				}
			}
			if (characterSelectionScreen.player4Image) {
				var deltaX = x - characterSelectionScreen.player4Image.x;
				var deltaY = y - characterSelectionScreen.player4Image.y;
				var distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
				if (distance < 150) {
					selectedPlayerAsset = 'jugador4';
					characterSelectionScreen.selectedCharacter = 'jugador4';
					return;
				}
			}
			// Check if play button was clicked
			if (characterSelectionScreen.playButton) {
				var deltaX = x - characterSelectionScreen.playButton.x;
				var deltaY = y - characterSelectionScreen.playButton.y;
				var distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
				if (distance < 150) {
					// Button click radius
					startGame();
					return;
				}
			}
			return;
		}
	}
	isDragging = true;
	// Move player to touch position (constrain to vertical movement)
	player.y = Math.max(100, Math.min(2732 - 100, y));
	var weaponLevel = player.shoot();
	if (weaponLevel > 0) {
		// Calculate direction vector from player to tap position
		var deltaX = x - player.x;
		var deltaY = y - player.y;
		var distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
		var directionX = 1;
		var directionY = 0;
		if (distance > 1.0) {
			directionX = deltaX / distance;
			directionY = deltaY / distance;
		}
		// Create bullets based on weapon level
		for (var w = 0; w < weaponLevel; w++) {
			var bullet = new Bullet();
			bullet.x = player.x + 40; // Spawn slightly ahead of player
			bullet.y = player.y - 40 + (w - Math.floor(weaponLevel / 2)) * 20; // Spread bullets vertically
			bullet.lastX = bullet.x;
			bullet.lastY = bullet.y;
			// Slight angle variation for multiple bullets
			var angleOffset = (w - Math.floor(weaponLevel / 2)) * 0.2;
			var cos = Math.cos(angleOffset);
			var sin = Math.sin(angleOffset);
			bullet.directionX = directionX * cos - directionY * sin;
			bullet.directionY = directionX * sin + directionY * cos;
			bullets.push(bullet);
			game.addChild(bullet);
		}
		LK.getSound('shoot').play();
	}
};
// Touch/mouse move - move player vertically while dragging
game.move = function (x, y, obj) {
	if (!gameStarted || characterSelectionScreen) return;
	if (isDragging) {
		// Move player to touch position (constrain to vertical movement)
		player.y = Math.max(100, Math.min(2732 - 100, y));
	}
};
// Touch/mouse up - stop dragging
game.up = function (x, y, obj) {
	if (!gameStarted || characterSelectionScreen) return;
	isDragging = false;
};
game.update = function () {
	// Only update game logic if game has started and not in character selection
	if (!gameStarted || characterSelectionScreen) return;
	// Update enemy spawn timer and difficulty
	enemySpawnTimer++;
	difficultyTimer++;
	powerupSpawnTimer++;
	// Update power-up timers
	if (playerShieldTime > 0) {
		playerShieldTime--;
	}
	if (playerWeaponTime > 0) {
		playerWeaponTime--;
		if (playerWeaponTime <= 0) {
			playerWeaponLevel = 1; // Reset to normal weapon
		}
	}
	// Increase difficulty every 10 seconds (600 frames)
	if (difficultyTimer % 600 === 0 && enemySpawnRate > 30) {
		enemySpawnRate -= 10; // Spawn enemies more frequently
	}
	// Update boss timer
	bossTimer++;
	// Check for boss battle cycle (every 2 minutes = 7200 frames)
	if (bossTimer >= 7200) {
		bossPhase = true;
		bossTimer = 0;
		bossesSpawned = 0;
	}
	// Spawn enemies based on boss phase
	if (!bossPhase) {
		// Normal enemy spawning during non-boss phase
		if (enemySpawnTimer >= enemySpawnRate) {
			var spawnType = Math.random();
			var spawnY = Math.random() * (2732 - 200) + 100;
			if (spawnType < 0.6) {
				// 60% chance for regular enemy
				var enemy = new Enemy();
				enemy.x = 2048 + 30;
				enemy.y = spawnY;
				enemy.lastX = enemy.x;
				enemies.push(enemy);
				game.addChild(enemy);
			} else if (spawnType < 0.8) {
				// 20% chance for fast enemy
				var fastEnemy = new FastEnemy();
				fastEnemy.x = 2048 + 30;
				fastEnemy.y = spawnY;
				fastEnemy.lastX = fastEnemy.x;
				fastEnemies.push(fastEnemy);
				game.addChild(fastEnemy);
			} else {
				// 20% chance for shield enemy
				var shieldEnemy = new ShieldEnemy();
				shieldEnemy.x = 2048 + 30;
				shieldEnemy.y = spawnY;
				shieldEnemy.lastX = shieldEnemy.x;
				shieldEnemies.push(shieldEnemy);
				game.addChild(shieldEnemy);
			}
			enemySpawnTimer = 0;
		}
	} else {
		// Boss phase - spawn 2 bosses then wait for them to be defeated
		if (bossesSpawned < 2 && enemySpawnTimer >= 60) {
			// Small delay between boss spawns
			var spawnY1 = Math.random() * (2732 - 400) + 200; // First boss position
			var spawnY2 = Math.random() * (2732 - 400) + 200; // Second boss position
			// Ensure bosses don't spawn too close to each other
			while (Math.abs(spawnY2 - spawnY1) < 300) {
				spawnY2 = Math.random() * (2732 - 400) + 200;
			}
			// Spawn first boss
			var bossEnemy1 = new BossEnemy();
			bossEnemy1.x = 2048 + 30;
			bossEnemy1.y = spawnY1;
			bossEnemy1.lastX = bossEnemy1.x;
			bossEnemies.push(bossEnemy1);
			game.addChild(bossEnemy1);
			// Spawn second boss
			var bossEnemy2 = new BossEnemy();
			bossEnemy2.x = 2048 + 30;
			bossEnemy2.y = spawnY2;
			bossEnemy2.lastX = bossEnemy2.x;
			bossEnemies.push(bossEnemy2);
			game.addChild(bossEnemy2);
			bossesSpawned = 2;
			enemySpawnTimer = 0;
		}
		// Check if all bosses are defeated to end boss phase
		if (bossesSpawned >= 2 && bossEnemies.length === 0) {
			bossPhase = false;
			bossTimer = 0; // Reset timer for next boss cycle
		}
	}
	// Spawn power-ups
	if (powerupSpawnTimer >= powerupSpawnRate) {
		var powerupType = Math.random();
		var spawnY = Math.random() * (2732 - 200) + 100;
		if (powerupType < 0.4) {
			// 40% chance for health power-up
			var healthPowerup = new HealthPowerup();
			healthPowerup.x = 2048 + 30;
			healthPowerup.y = spawnY;
			healthPowerup.lastX = healthPowerup.x;
			healthPowerup.lastY = healthPowerup.y;
			healthPowerups.push(healthPowerup);
			game.addChild(healthPowerup);
		} else if (powerupType < 0.7) {
			// 30% chance for shield power-up
			var shieldPowerup = new ShieldPowerup();
			shieldPowerup.x = 2048 + 30;
			shieldPowerup.y = spawnY;
			shieldPowerup.lastX = shieldPowerup.x;
			shieldPowerup.lastY = shieldPowerup.y;
			shieldPowerups.push(shieldPowerup);
			game.addChild(shieldPowerup);
		} else {
			// 30% chance for weapon power-up
			var weaponPowerup = new WeaponPowerup();
			weaponPowerup.x = 2048 + 30;
			weaponPowerup.y = spawnY;
			weaponPowerup.lastX = weaponPowerup.x;
			weaponPowerup.lastY = weaponPowerup.y;
			weaponPowerups.push(weaponPowerup);
			game.addChild(weaponPowerup);
		}
		powerupSpawnTimer = 0;
	}
	// Update and check bullets
	for (var i = bullets.length - 1; i >= 0; i--) {
		var bullet = bullets[i];
		// Mark bullets that go off screen for removal
		if (bullet.x > 2048 + 50 || bullet.y < -50) {
			bulletsToRemove.push(bullet);
			continue;
		}
		// Skip collision detection for bullets outside meaningful collision zones
		if (bullet.x < -50 || bullet.x > 2100 || bullet.y < -50 || bullet.y > 2800) {
			continue;
		}
		// Check bullet vs enemy collisions
		var bulletHit = false;
		// Check regular enemies
		for (var j = enemies.length - 1; j >= 0; j--) {
			var enemy = enemies[j];
			// Skip enemies outside collision zone (bounding box check)
			if (enemy.x < -250 || enemy.x > 2100 || enemy.y < -50 || enemy.y > 2800) {
				continue;
			}
			// Check bullet collision with regular enemy using distance-based detection
			var deltaX = bullet.x - enemy.x;
			var deltaY = bullet.y - enemy.y;
			var distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
			if (distance < 80) {
				// 80px collision radius for regular enemies
				// Bullet hit enemy
				LK.setScore(LK.getScore() + 10);
				scoreTxt.setText(LK.getScore());
				// Check for victory condition
				if (LK.getScore() >= 10000) {
					LK.showYouWin();
					return;
				}
				// Visual feedback
				tween(enemy, {
					scaleX: 1.5,
					scaleY: 1.5,
					alpha: 0
				}, {
					duration: 200,
					onFinish: function onFinish() {
						if (enemy.parent) {
							enemy.destroy();
						}
					}
				});
				enemiesToRemove.push(enemy);
				bulletsToRemove.push(bullet);
				bulletHit = true;
				LK.getSound('hit').play();
				break;
			}
		}
		// Check fast enemies
		for (var j = fastEnemies.length - 1; j >= 0; j--) {
			var fastEnemy = fastEnemies[j];
			// Skip fast enemies outside collision zone (bounding box check)
			if (fastEnemy.x < -250 || fastEnemy.x > 2100 || fastEnemy.y < -50 || fastEnemy.y > 2800) {
				continue;
			}
			// Check bullet collision with fast enemy using distance-based detection
			var deltaX = bullet.x - fastEnemy.x;
			var deltaY = bullet.y - fastEnemy.y;
			var distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
			if (distance < 85) {
				// 85px collision radius for fast enemies
				LK.setScore(LK.getScore() + 15);
				scoreTxt.setText(LK.getScore());
				if (LK.getScore() >= 10000) {
					LK.showYouWin();
					return;
				}
				tween(fastEnemy, {
					scaleX: 1.5,
					scaleY: 1.5,
					alpha: 0
				}, {
					duration: 200,
					onFinish: function onFinish() {
						if (fastEnemy.parent) {
							fastEnemy.destroy();
						}
					}
				});
				fastEnemiesToRemove.push(fastEnemy);
				bulletsToRemove.push(bullet);
				bulletHit = true;
				LK.getSound('hit').play();
				break;
			}
		}
		// Check shield enemies
		for (var j = shieldEnemies.length - 1; j >= 0; j--) {
			var shieldEnemy = shieldEnemies[j];
			// Skip shield enemies outside collision zone (bounding box check)
			if (shieldEnemy.x < -250 || shieldEnemy.x > 2100 || shieldEnemy.y < -50 || shieldEnemy.y > 2800) {
				continue;
			}
			// Check bullet collision with shield enemy using distance-based detection
			var deltaX = bullet.x - shieldEnemy.x;
			var deltaY = bullet.y - shieldEnemy.y;
			var distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
			if (distance < 90) {
				// 90px collision radius for shield enemies (larger due to shield)
				if (shieldEnemy.takeDamage()) {
					LK.setScore(LK.getScore() + 30);
					scoreTxt.setText(LK.getScore());
					if (LK.getScore() >= 10000) {
						LK.showYouWin();
						return;
					}
					tween(shieldEnemy, {
						scaleX: 1.5,
						scaleY: 1.5,
						alpha: 0
					}, {
						duration: 200,
						onFinish: function onFinish() {
							if (shieldEnemy.parent) {
								shieldEnemy.destroy();
							}
						}
					});
					shieldEnemiesToRemove.push(shieldEnemy);
				} else {
					LK.setScore(LK.getScore() + 5);
					scoreTxt.setText(LK.getScore());
				}
				bulletsToRemove.push(bullet);
				bulletHit = true;
				LK.getSound('hit').play();
				break;
			}
		}
		// Check boss enemies
		for (var j = bossEnemies.length - 1; j >= 0; j--) {
			var bossEnemy = bossEnemies[j];
			// Skip boss enemies outside collision zone (bounding box check)
			if (bossEnemy.x < -250 || bossEnemy.x > 2100 || bossEnemy.y < -50 || bossEnemy.y > 2800) {
				continue;
			}
			// Check bullet collision with boss enemy using distance-based detection
			var deltaX = bullet.x - bossEnemy.x;
			var deltaY = bullet.y - bossEnemy.y;
			var distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
			if (distance < 80) {
				// 80px collision radius for boss enemies (much larger due to 2x scale and boss status)
				if (bossEnemy.takeDamage()) {
					LK.setScore(LK.getScore() + 100);
					scoreTxt.setText(LK.getScore());
					if (LK.getScore() >= 10000) {
						LK.showYouWin();
						return;
					}
					tween(bossEnemy, {
						scaleX: 3,
						scaleY: 3,
						alpha: 0
					}, {
						duration: 500,
						onFinish: function onFinish() {
							if (bossEnemy.parent) {
								bossEnemy.destroy();
							}
						}
					});
					bossEnemiesToRemove.push(bossEnemy);
				} else {
					LK.setScore(LK.getScore() + 10);
					scoreTxt.setText(LK.getScore());
				}
				bulletsToRemove.push(bullet);
				bulletHit = true;
				LK.getSound('hit').play();
				break;
			}
		}
		if (bulletHit) continue;
	}
	// Update and check enemy bullets
	for (var m = enemyBullets.length - 1; m >= 0; m--) {
		var enemyBullet = enemyBullets[m];
		// Mark enemy bullets that go off screen for removal
		if (enemyBullet.x < -50 || enemyBullet.y < -50 || enemyBullet.y > 2732 + 50) {
			enemyBulletsToRemove.push(enemyBullet);
			continue;
		}
		// Skip collision detection for enemy bullets outside meaningful collision zones
		if (enemyBullet.x < -50 || enemyBullet.x > 2100 || enemyBullet.y < -50 || enemyBullet.y > 2800) {
			continue;
		}
		// Check if enemy bullet hits player center (more precise collision)
		var deltaX = enemyBullet.x - player.x;
		var deltaY = enemyBullet.y - player.y;
		var distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
		if (distance < 45) {
			// Only hits if within 45 pixels of player center (consistent bullet collision radius)
			if (playerShieldTime <= 0) {
				// Only take damage if not shielded
				playerLives--;
				// Update lives number display
				if (livesNumberTxt) {
					livesNumberTxt.setText(playerLives.toString());
				}
				LK.effects.flashScreen(0xFF0000, 500);
				if (playerLives <= 0) {
					LK.showGameOver();
					return;
				}
			}
			enemyBulletsToRemove.push(enemyBullet);
		}
	}
	// Update and check regular enemies
	for (var k = enemies.length - 1; k >= 0; k--) {
		var enemy = enemies[k];
		// Mark enemies that go off screen for removal
		if (enemy.x < -200) {
			// Regular enemy width is 200px
			enemiesEscaped++;
			if (enemiesEscaped >= 5) {
				LK.showGameOver();
				return;
			}
			enemiesToRemove.push(enemy);
			continue;
		}
		// Skip processing for enemies outside meaningful interaction zones
		if (enemy.x < -250 || enemy.x > 2100 || enemy.y < -50 || enemy.y > 2800) {
			continue;
		}
		// Calculate distance once for collision detection
		var deltaX = player.x - enemy.x;
		var deltaY = player.y - enemy.y;
		var distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
		// Enemy shooting logic
		if (enemy.shoot()) {
			var enemyBullet = new EnemyBullet();
			var bulletOffset = 10; // Additional offset beyond enemy edge
			enemyBullet.x = enemy.x - (enemy.width / 2 + bulletOffset); // Spawn relative to enemy width
			enemyBullet.y = enemy.y;
			enemyBullet.lastX = enemyBullet.x;
			enemyBullet.lastY = enemyBullet.y;
			// Shoot straight left - no player tracking
			enemyBullet.directionX = -1;
			enemyBullet.directionY = 0;
			enemyBullets.push(enemyBullet);
			game.addChild(enemyBullet);
		}
		// Check if enemy collides with player center using same distance calculation
		if (distance < 60) {
			// Only hits if within 60 pixels of player center (larger radius for direct contact)
			if (playerShieldTime <= 0) {
				// Only take damage if not shielded
				playerLives--;
				// Update lives number display
				if (livesNumberTxt) {
					livesNumberTxt.setText(playerLives.toString());
				}
				LK.effects.flashScreen(0xFF0000, 500);
				if (playerLives <= 0) {
					LK.showGameOver();
					return;
				}
			}
			enemiesToRemove.push(enemy);
		}
	}
	// Update and check fast enemies
	for (var k = fastEnemies.length - 1; k >= 0; k--) {
		var fastEnemy = fastEnemies[k];
		// Mark fast enemies that go off screen for removal
		if (fastEnemy.x < -200) {
			// Fast enemy width is 200px
			enemiesEscaped++;
			if (enemiesEscaped >= 5) {
				LK.showGameOver();
				return;
			}
			fastEnemiesToRemove.push(fastEnemy);
			continue;
		}
		// Skip processing for fast enemies outside meaningful interaction zones
		if (fastEnemy.x < -250 || fastEnemy.x > 2100 || fastEnemy.y < -50 || fastEnemy.y > 2800) {
			continue;
		}
		// Calculate distance once for collision detection
		var deltaX = player.x - fastEnemy.x;
		var deltaY = player.y - fastEnemy.y;
		var distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
		if (fastEnemy.shoot()) {
			var enemyBullet = new EnemyBullet();
			var bulletOffset = 10; // Additional offset beyond enemy edge
			enemyBullet.x = fastEnemy.x - (fastEnemy.width / 2 + bulletOffset); // Spawn relative to enemy width
			enemyBullet.y = fastEnemy.y;
			enemyBullet.lastX = enemyBullet.x;
			enemyBullet.lastY = enemyBullet.y;
			// Shoot straight left - no player tracking
			enemyBullet.directionX = -1;
			enemyBullet.directionY = 0;
			enemyBullets.push(enemyBullet);
			game.addChild(enemyBullet);
		}
		// Check if fast enemy collides with player center using same distance calculation
		if (distance < 65) {
			// Only hits if within 65 pixels of player center (slightly larger due to fast movement)
			if (playerShieldTime <= 0) {
				// Only take damage if not shielded
				playerLives--;
				// Update lives number display
				if (livesNumberTxt) {
					livesNumberTxt.setText(playerLives.toString());
				}
				LK.effects.flashScreen(0xFF0000, 500);
				if (playerLives <= 0) {
					LK.showGameOver();
					return;
				}
			}
			fastEnemiesToRemove.push(fastEnemy);
		}
	}
	// Update and check shield enemies
	for (var k = shieldEnemies.length - 1; k >= 0; k--) {
		var shieldEnemy = shieldEnemies[k];
		// Mark shield enemies that go off screen for removal
		if (shieldEnemy.x < -200) {
			// Shield enemy width is 200px
			enemiesEscaped++;
			if (enemiesEscaped >= 5) {
				LK.showGameOver();
				return;
			}
			shieldEnemiesToRemove.push(shieldEnemy);
			continue;
		}
		// Skip processing for shield enemies outside meaningful interaction zones
		if (shieldEnemy.x < -250 || shieldEnemy.x > 2100 || shieldEnemy.y < -50 || shieldEnemy.y > 2800) {
			continue;
		}
		// Calculate distance once for collision detection
		var deltaX = player.x - shieldEnemy.x;
		var deltaY = player.y - shieldEnemy.y;
		var distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
		if (shieldEnemy.shoot()) {
			var enemyBullet = new EnemyBullet();
			var bulletOffset = 10; // Additional offset beyond enemy edge
			enemyBullet.x = shieldEnemy.x - (shieldEnemy.width / 2 + bulletOffset); // Spawn relative to enemy width
			enemyBullet.y = shieldEnemy.y;
			enemyBullet.lastX = enemyBullet.x;
			enemyBullet.lastY = enemyBullet.y;
			// Shoot straight left - no player tracking
			enemyBullet.directionX = -1;
			enemyBullet.directionY = 0;
			enemyBullets.push(enemyBullet);
			game.addChild(enemyBullet);
		}
		// Check if shield enemy collides with player center using same distance calculation
		if (distance < 70) {
			// Only hits if within 70 pixels of player center (larger due to shield size)
			if (playerShieldTime <= 0) {
				// Only take damage if not shielded
				playerLives--;
				// Update lives number display
				if (livesNumberTxt) {
					livesNumberTxt.setText(playerLives.toString());
				}
				LK.effects.flashScreen(0xFF0000, 500);
				if (playerLives <= 0) {
					LK.showGameOver();
					return;
				}
			}
			shieldEnemiesToRemove.push(shieldEnemy);
		}
	}
	// Update and check health power-ups
	for (var p = healthPowerups.length - 1; p >= 0; p--) {
		var healthPowerup = healthPowerups[p];
		// Remove if off screen
		if (healthPowerup.x < -100) {
			healthPowerupsToRemove.push(healthPowerup);
			continue;
		}
		// Check collision with player
		var deltaX = healthPowerup.x - player.x;
		var deltaY = healthPowerup.y - player.y;
		var distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
		if (distance < 60) {
			// Player collected health power-up
			if (playerLives < 5) {
				// Max 5 lives
				playerLives++;
				// Update lives number display
				if (livesNumberTxt) {
					livesNumberTxt.setText(playerLives.toString());
				}
				LK.getSound('powerup').play();
				LK.effects.flashScreen(0x00ff00, 300);
			}
			healthPowerupsToRemove.push(healthPowerup);
		}
	}
	// Update and check shield power-ups
	for (var p = shieldPowerups.length - 1; p >= 0; p--) {
		var shieldPowerup = shieldPowerups[p];
		// Remove if off screen
		if (shieldPowerup.x < -100) {
			shieldPowerupsToRemove.push(shieldPowerup);
			continue;
		}
		// Check collision with player
		var deltaX = shieldPowerup.x - player.x;
		var deltaY = shieldPowerup.y - player.y;
		var distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
		if (distance < 60) {
			// Player collected shield power-up
			playerShieldTime = 600; // 10 seconds of invincibility
			LK.getSound('powerup').play();
			LK.effects.flashScreen(0x0088ff, 300);
			shieldPowerupsToRemove.push(shieldPowerup);
		}
	}
	// Update and check weapon power-ups
	for (var p = weaponPowerups.length - 1; p >= 0; p--) {
		var weaponPowerup = weaponPowerups[p];
		// Remove if off screen
		if (weaponPowerup.x < -100) {
			weaponPowerupsToRemove.push(weaponPowerup);
			continue;
		}
		// Check collision with player
		var deltaX = weaponPowerup.x - player.x;
		var deltaY = weaponPowerup.y - player.y;
		var distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
		if (distance < 60) {
			// Player collected weapon power-up
			playerWeaponLevel = Math.min(3, playerWeaponLevel + 1); // Max level 3
			playerWeaponTime = 1800; // 30 seconds of upgrade
			LK.getSound('powerup').play();
			LK.effects.flashScreen(0xffaa00, 300);
			weaponPowerupsToRemove.push(weaponPowerup);
		}
	}
	// Update and check boss enemies
	for (var k = bossEnemies.length - 1; k >= 0; k--) {
		var bossEnemy = bossEnemies[k];
		// Mark boss enemies that go off screen for removal
		if (bossEnemy.x < -200) {
			// Boss enemy width is 100px * 2 scale = 200px
			enemiesEscaped++;
			if (enemiesEscaped >= 5) {
				LK.showGameOver();
				return;
			}
			bossEnemiesToRemove.push(bossEnemy);
			continue;
		}
		// Skip processing for boss enemies outside meaningful interaction zones
		if (bossEnemy.x < -250 || bossEnemy.x > 2100 || bossEnemy.y < -50 || bossEnemy.y > 2800) {
			continue;
		}
		// Calculate distance once for collision detection
		var deltaX = player.x - bossEnemy.x;
		var deltaY = player.y - bossEnemy.y;
		var distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
		if (bossEnemy.shoot()) {
			var enemyBullet = new EnemyBullet();
			var bulletOffset = 10; // Additional offset beyond enemy edge
			enemyBullet.x = bossEnemy.x - (bossEnemy.width / 2 + bulletOffset); // Spawn relative to enemy width (scaled)
			enemyBullet.y = bossEnemy.y;
			enemyBullet.lastX = enemyBullet.x;
			enemyBullet.lastY = enemyBullet.y;
			// Shoot straight left - no player tracking
			enemyBullet.directionX = -1;
			enemyBullet.directionY = 0;
			enemyBullets.push(enemyBullet);
			game.addChild(enemyBullet);
		}
		// Check if boss enemy collides with player center using same distance calculation
		if (distance < 90) {
			// Only hits if within 90 pixels of player center (much larger due to 2x scale and boss size)
			if (playerShieldTime <= 0) {
				// Only take damage if not shielded
				playerLives--;
				// Update lives number display
				if (livesNumberTxt) {
					livesNumberTxt.setText(playerLives.toString());
				}
				LK.effects.flashScreen(0xFF0000, 500);
				if (playerLives <= 0) {
					LK.showGameOver();
					return;
				}
			}
			bossEnemiesToRemove.push(bossEnemy);
		}
	}
	// Deferred cleanup - process all marked objects for removal using safer object-based iteration
	// Process bullets marked for removal
	for (var i = bulletsToRemove.length - 1; i >= 0; i--) {
		var bulletToRemove = bulletsToRemove[i];
		if (bulletToRemove && bulletToRemove.parent) {
			var index = bullets.indexOf(bulletToRemove);
			if (index !== -1 && index < bullets.length) {
				bullets[index].cleanup();
				bullets[index].destroy();
				bullets.splice(index, 1);
			}
		}
	}
	bulletsToRemove = [];
	// Process enemy bullets marked for removal
	for (var i = enemyBulletsToRemove.length - 1; i >= 0; i--) {
		var enemyBulletToRemove = enemyBulletsToRemove[i];
		if (enemyBulletToRemove && enemyBulletToRemove.parent) {
			var index = enemyBullets.indexOf(enemyBulletToRemove);
			if (index !== -1 && index < enemyBullets.length) {
				enemyBullets[index].cleanup();
				enemyBullets[index].destroy();
				enemyBullets.splice(index, 1);
			}
		}
	}
	enemyBulletsToRemove = [];
	// Process regular enemies marked for removal
	for (var i = enemiesToRemove.length - 1; i >= 0; i--) {
		var enemyToRemove = enemiesToRemove[i];
		if (enemyToRemove && enemyToRemove.parent) {
			var index = enemies.indexOf(enemyToRemove);
			if (index !== -1 && index < enemies.length) {
				enemies[index].cleanup();
				enemies[index].destroy();
				enemies.splice(index, 1);
			}
		}
	}
	enemiesToRemove = [];
	// Process fast enemies marked for removal
	for (var i = fastEnemiesToRemove.length - 1; i >= 0; i--) {
		var fastEnemyToRemove = fastEnemiesToRemove[i];
		if (fastEnemyToRemove && fastEnemyToRemove.parent) {
			var index = fastEnemies.indexOf(fastEnemyToRemove);
			if (index !== -1 && index < fastEnemies.length) {
				fastEnemies[index].cleanup();
				fastEnemies[index].destroy();
				fastEnemies.splice(index, 1);
			}
		}
	}
	fastEnemiesToRemove = [];
	// Process shield enemies marked for removal
	for (var i = shieldEnemiesToRemove.length - 1; i >= 0; i--) {
		var shieldEnemyToRemove = shieldEnemiesToRemove[i];
		if (shieldEnemyToRemove && shieldEnemyToRemove.parent) {
			var index = shieldEnemies.indexOf(shieldEnemyToRemove);
			if (index !== -1 && index < shieldEnemies.length) {
				shieldEnemies[index].cleanup();
				shieldEnemies[index].destroy();
				shieldEnemies.splice(index, 1);
			}
		}
	}
	shieldEnemiesToRemove = [];
	// Process boss enemies marked for removal
	for (var i = bossEnemiesToRemove.length - 1; i >= 0; i--) {
		var bossEnemyToRemove = bossEnemiesToRemove[i];
		if (bossEnemyToRemove && bossEnemyToRemove.parent) {
			var index = bossEnemies.indexOf(bossEnemyToRemove);
			if (index !== -1 && index < bossEnemies.length) {
				bossEnemies[index].cleanup();
				bossEnemies[index].destroy();
				bossEnemies.splice(index, 1);
			}
		}
	}
	bossEnemiesToRemove = [];
	// Process health power-ups marked for removal
	for (var i = healthPowerupsToRemove.length - 1; i >= 0; i--) {
		var healthPowerupToRemove = healthPowerupsToRemove[i];
		if (healthPowerupToRemove && healthPowerupToRemove.parent) {
			var index = healthPowerups.indexOf(healthPowerupToRemove);
			if (index !== -1 && index < healthPowerups.length) {
				healthPowerups[index].cleanup();
				healthPowerups[index].destroy();
				healthPowerups.splice(index, 1);
			}
		}
	}
	healthPowerupsToRemove = [];
	// Process shield power-ups marked for removal
	for (var i = shieldPowerupsToRemove.length - 1; i >= 0; i--) {
		var shieldPowerupToRemove = shieldPowerupsToRemove[i];
		if (shieldPowerupToRemove && shieldPowerupToRemove.parent) {
			var index = shieldPowerups.indexOf(shieldPowerupToRemove);
			if (index !== -1 && index < shieldPowerups.length) {
				shieldPowerups[index].cleanup();
				shieldPowerups[index].destroy();
				shieldPowerups.splice(index, 1);
			}
		}
	}
	shieldPowerupsToRemove = [];
	// Process weapon power-ups marked for removal
	for (var i = weaponPowerupsToRemove.length - 1; i >= 0; i--) {
		var weaponPowerupToRemove = weaponPowerupsToRemove[i];
		if (weaponPowerupToRemove && weaponPowerupToRemove.parent) {
			var index = weaponPowerups.indexOf(weaponPowerupToRemove);
			if (index !== -1 && index < weaponPowerups.length) {
				weaponPowerups[index].cleanup();
				weaponPowerups[index].destroy();
				weaponPowerups.splice(index, 1);
			}
		}
	}
	weaponPowerupsToRemove = [];
	// Monitor array sizes and implement limits to prevent memory leaks
	var maxBullets = 100;
	var maxEnemyBullets = 200;
	var maxEnemies = 50;
	// Limit bullets array size with safety checks
	if (bullets.length > maxBullets) {
		for (var i = bullets.length - 1; i >= maxBullets; i--) {
			if (i < bullets.length && bullets[i]) {
				bullets[i].cleanup();
				bullets[i].destroy();
				bullets.splice(i, 1);
			}
		}
	}
	// Limit enemy bullets array size with safety checks
	if (enemyBullets.length > maxEnemyBullets) {
		for (var i = enemyBullets.length - 1; i >= maxEnemyBullets; i--) {
			if (i < enemyBullets.length && enemyBullets[i]) {
				enemyBullets[i].cleanup();
				enemyBullets[i].destroy();
				enemyBullets.splice(i, 1);
			}
		}
	}
	// Limit enemies array size with safety checks
	if (enemies.length > maxEnemies) {
		for (var i = enemies.length - 1; i >= maxEnemies; i--) {
			if (i < enemies.length && enemies[i]) {
				enemies[i].cleanup();
				enemies[i].destroy();
				enemies.splice(i, 1);
			}
		}
	}
	// Limit fast enemies array size with safety checks
	if (fastEnemies.length > maxEnemies) {
		for (var i = fastEnemies.length - 1; i >= maxEnemies; i--) {
			if (i < fastEnemies.length && fastEnemies[i]) {
				fastEnemies[i].cleanup();
				fastEnemies[i].destroy();
				fastEnemies.splice(i, 1);
			}
		}
	}
	// Limit shield enemies array size with safety checks
	if (shieldEnemies.length > maxEnemies) {
		for (var i = shieldEnemies.length - 1; i >= maxEnemies; i--) {
			if (i < shieldEnemies.length && shieldEnemies[i]) {
				shieldEnemies[i].cleanup();
				shieldEnemies[i].destroy();
				shieldEnemies.splice(i, 1);
			}
		}
	}
	// Limit boss enemies array size with safety checks
	if (bossEnemies.length > maxEnemies) {
		for (var i = bossEnemies.length - 1; i >= maxEnemies; i--) {
			if (i < bossEnemies.length && bossEnemies[i]) {
				bossEnemies[i].cleanup();
				bossEnemies[i].destroy();
				bossEnemies.splice(i, 1);
			}
		}
	}
};
// Play background music
LK.playMusic('bgmusic');

===================================================================
--- original.js
+++ change.js
@@ -1128,10 +1128,10 @@
 		// Check if enemy bullet hits player center (more precise collision)
 		var deltaX = enemyBullet.x - player.x;
 		var deltaY = enemyBullet.y - player.y;
 		var distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
-		if (distance < 35) {
-			// Only hits if within 35 pixels of player center (consistent bullet collision radius)
+		if (distance < 45) {
+			// Only hits if within 45 pixels of player center (consistent bullet collision radius)
 			if (playerShieldTime <= 0) {
 				// Only take damage if not shielded
 				playerLives--;
 				// Update lives number display
@@ -1321,9 +1321,9 @@
 		// Check collision with player
 		var deltaX = healthPowerup.x - player.x;
 		var deltaY = healthPowerup.y - player.y;
 		var distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
-		if (distance < 50) {
+		if (distance < 60) {
 			// Player collected health power-up
 			if (playerLives < 5) {
 				// Max 5 lives
 				playerLives++;
@@ -1348,9 +1348,9 @@
 		// Check collision with player
 		var deltaX = shieldPowerup.x - player.x;
 		var deltaY = shieldPowerup.y - player.y;
 		var distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
-		if (distance < 50) {
+		if (distance < 60) {
 			// Player collected shield power-up
 			playerShieldTime = 600; // 10 seconds of invincibility
 			LK.getSound('powerup').play();
 			LK.effects.flashScreen(0x0088ff, 300);
@@ -1368,9 +1368,9 @@
 		// Check collision with player
 		var deltaX = weaponPowerup.x - player.x;
 		var deltaY = weaponPowerup.y - player.y;
 		var distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
-		if (distance < 50) {
+		if (distance < 60) {
 			// Player collected weapon power-up
 			playerWeaponLevel = Math.min(3, playerWeaponLevel + 1); // Max level 3
 			playerWeaponTime = 1800; // 30 seconds of upgrade
 			LK.getSound('powerup').play();