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

/**** 
* Classes
****/ 
var Boss = Container.expand(function (generation) {
	var self = Container.call(this);
	var bossGraphics = self.attachAsset('boss', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Assign random color to boss
	var randomColors = [0xFF6B6B, 0x4ECDC4, 0x45B7D1, 0x96CEB4, 0xFECE7C, 0xF38BA8, 0xA8E6CF, 0xC7CEEA, 0xFFB3BA, 0xBAE1FF];
	var randomColor = randomColors[Math.floor(Math.random() * randomColors.length)];
	bossGraphics.tint = randomColor;
	self.speed = 1;
	self.generation = generation || 1;
	self.health = (2 + self.generation) * 3; // First boss has 9 health, second has 12, etc.
	self.maxHealth = (2 + self.generation) * 3;
	self.direction = {
		x: 0,
		y: 0
	};
	// Each generation doubles in base size: 1.5 * (2^(generation-1))
	self.baseScale = 1.5 * Math.pow(2, self.generation - 1);
	self.maxScale = self.baseScale * 2.67; // Keep same ratio as original (4/1.5)
	self.lastDistanceFromPlayer = 0;
	// Health bar setup
	var healthBarBg = self.attachAsset('healthBarBg', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	healthBarBg.y = -80; // Position above boss
	var healthBarFill = self.attachAsset('healthBarFill', {
		anchorX: 0,
		anchorY: 0.5
	});
	healthBarFill.x = healthBarBg.x - healthBarBg.width / 2;
	healthBarFill.y = healthBarBg.y;
	self.updateHealthBar = function () {
		var healthPercent = self.health / self.maxHealth;
		healthBarFill.width = 120 * healthPercent;
		// Change color based on health
		if (healthPercent > 0.6) {
			healthBarFill.tint = 0x00ff00; // Green
		} else if (healthPercent > 0.3) {
			healthBarFill.tint = 0xffff00; // Yellow
		} else {
			healthBarFill.tint = 0xff0000; // Red
		}
	};
	// Initialize health bar
	self.updateHealthBar();
	self.update = function () {
		// Calculate direction toward player every frame
		var dx = player.x - self.x;
		var dy = player.y - self.y;
		var length = Math.sqrt(dx * dx + dy * dy);
		// Track distance for scaling
		self.lastDistanceFromPlayer = length;
		if (length > 0) {
			self.direction.x = dx / length;
			self.direction.y = dy / length;
		}
		// Keep boss at constant base scale
		bossGraphics.scaleX = self.baseScale;
		bossGraphics.scaleY = self.baseScale;
		self.x += self.direction.x * self.speed;
		self.y += self.direction.y * self.speed;
		// Update health bar
		self.updateHealthBar();
	};
	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 = 80;
	self.direction = {
		x: 0,
		y: 0
	};
	self.isGuided = false;
	self.setDirection = function (dirX, dirY) {
		self.direction.x = dirX;
		self.direction.y = dirY;
		// Calculate rotation angle based on direction and rotate the bullet graphics
		var angle = Math.atan2(dirY, dirX);
		bulletGraphics.rotation = angle;
	};
	self.update = function () {
		if (self.isGuided) {
			// Find closest enemy
			var closestEnemy = null;
			var closestDistance = Infinity;
			// Check regular enemies
			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;
				}
			}
			// Check golden enemies
			for (var i = 0; i < goldenEnemies.length; i++) {
				var goldenEnemy = goldenEnemies[i];
				var dx = goldenEnemy.x - self.x;
				var dy = goldenEnemy.y - self.y;
				var distance = Math.sqrt(dx * dx + dy * dy);
				if (distance < closestDistance) {
					closestDistance = distance;
					closestEnemy = goldenEnemy;
				}
			}
			// Check explosive enemies
			for (var i = 0; i < explosiveEnemies.length; i++) {
				var explosiveEnemy = explosiveEnemies[i];
				var dx = explosiveEnemy.x - self.x;
				var dy = explosiveEnemy.y - self.y;
				var distance = Math.sqrt(dx * dx + dy * dy);
				if (distance < closestDistance) {
					closestDistance = distance;
					closestEnemy = explosiveEnemy;
				}
			}
			// Check bosses
			for (var i = 0; i < bosses.length; i++) {
				var boss = bosses[i];
				var dx = boss.x - self.x;
				var dy = boss.y - self.y;
				var distance = Math.sqrt(dx * dx + dy * dy);
				if (distance < closestDistance) {
					closestDistance = distance;
					closestEnemy = boss;
				}
			}
			// Update direction towards closest enemy
			if (closestEnemy && closestDistance > 0) {
				var dx = closestEnemy.x - self.x;
				var dy = closestEnemy.y - self.y;
				var length = Math.sqrt(dx * dx + dy * dy);
				self.direction.x = dx / length;
				self.direction.y = dy / length;
				// Update bullet rotation
				var angle = Math.atan2(dy, dx);
				bulletGraphics.rotation = angle;
			}
		}
		self.x += self.direction.x * self.speed;
		self.y += self.direction.y * self.speed;
	};
	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 = 2;
	self.health = 1;
	self.direction = {
		x: 0,
		y: 0
	};
	self.update = function () {
		// Calculate direction toward player every frame
		var dx = player.x - self.x;
		var dy = player.y - self.y;
		var length = Math.sqrt(dx * dx + dy * dy);
		if (length > 0) {
			self.direction.x = dx / length;
			self.direction.y = dy / length;
		}
		self.x += self.direction.x * self.speed;
		self.y += self.direction.y * self.speed;
	};
	return self;
});
var ExplosiveEnemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('explosiveEnemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Assign random color to explosive enemy
	var randomColors = [0xFF6B6B, 0x4ECDC4, 0x45B7D1, 0x96CEB4, 0xFECE7C, 0xF38BA8, 0xA8E6CF, 0xC7CEEA, 0xFFB3BA, 0xBAE1FF];
	var randomColor = randomColors[Math.floor(Math.random() * randomColors.length)];
	enemyGraphics.tint = randomColor;
	self.speed = 1.8;
	self.health = 5;
	self.maxHealth = 5;
	self.direction = {
		x: 0,
		y: 0
	};
	self.hasExploded = false;
	// Create explosion damage zone
	self.explode = function () {
		if (self.hasExploded) return;
		self.hasExploded = true;
		// Create explosion visual effect
		LK.effects.flashObject(self, 0xFF0000, 500);
		LK.effects.flashScreen(0xFF4444, 300);
		// Check for damage to nearby enemies and player
		var explosionRadius = 350;
		// Damage player if in range
		var playerDx = player.x - self.x;
		var playerDy = player.y - self.y;
		var playerDistance = Math.sqrt(playerDx * playerDx + playerDy * playerDy);
		if (playerDistance <= explosionRadius) {
			LK.effects.flashScreen(0xFF0000, 1000);
			LK.showGameOver();
			return;
		}
		// Damage nearby enemies
		for (var i = enemies.length - 1; i >= 0; 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 <= explosionRadius && enemy !== self) {
				enemy.destroy();
				enemies.splice(i, 1);
				LK.setScore(LK.getScore() + 5);
				playRandomEnemyKillSound();
			}
		}
		// Damage nearby golden enemies
		for (var i = goldenEnemies.length - 1; i >= 0; i--) {
			var goldenEnemy = goldenEnemies[i];
			var dx = goldenEnemy.x - self.x;
			var dy = goldenEnemy.y - self.y;
			var distance = Math.sqrt(dx * dx + dy * dy);
			if (distance <= explosionRadius) {
				goldenEnemy.destroy();
				goldenEnemies.splice(i, 1);
				LK.setScore(LK.getScore() + 25);
				playRandomEnemyKillSound();
			}
		}
		// Damage nearby explosive enemies
		for (var i = explosiveEnemies.length - 1; i >= 0; i--) {
			var explosiveEnemy = explosiveEnemies[i];
			var dx = explosiveEnemy.x - self.x;
			var dy = explosiveEnemy.y - self.y;
			var distance = Math.sqrt(dx * dx + dy * dy);
			if (distance <= explosionRadius && explosiveEnemy !== self) {
				explosiveEnemy.destroy();
				explosiveEnemies.splice(i, 1);
				LK.setScore(LK.getScore() + 15);
				playRandomEnemyKillSound();
			}
		}
		// Damage nearby bosses
		for (var i = 0; i < bosses.length; i++) {
			var boss = bosses[i];
			var dx = boss.x - self.x;
			var dy = boss.y - self.y;
			var distance = Math.sqrt(dx * dx + dy * dy);
			if (distance <= explosionRadius) {
				boss.health -= 2;
				boss.updateHealthBar();
				LK.effects.flashObject(boss, 0xFF0000, 300);
				LK.setScore(LK.getScore() + 10);
			}
		}
		// Create visual explosion zone
		var explosionZone = LK.getAsset('explosion', {
			anchorX: 0.5,
			anchorY: 0.5
		});
		explosionZone.x = self.x;
		explosionZone.y = self.y;
		explosionZone.scaleX = explosionRadius / 200;
		explosionZone.scaleY = explosionRadius / 200;
		explosionZone.alpha = 0.8;
		game.addChild(explosionZone);
		// Animate explosion zone
		tween(explosionZone, {
			scaleX: explosionZone.scaleX * 1.5,
			scaleY: explosionZone.scaleY * 1.5,
			alpha: 0
		}, {
			duration: 500,
			onFinish: function onFinish() {
				explosionZone.destroy();
			}
		});
	};
	self.update = function () {
		// Calculate direction toward player every frame
		var dx = player.x - self.x;
		var dy = player.y - self.y;
		var length = Math.sqrt(dx * dx + dy * dy);
		if (length > 0) {
			self.direction.x = dx / length;
			self.direction.y = dy / length;
		}
		self.x += self.direction.x * self.speed;
		self.y += self.direction.y * self.speed;
		// Check if health reached 1 and explode
		if (self.health <= 1 && !self.hasExploded) {
			self.explode();
		}
	};
	return self;
});
var GoldenEnemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('goldenEnemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 1.5;
	self.health = 2;
	self.direction = {
		x: 0,
		y: 0
	};
	self.update = function () {
		// Calculate direction toward player every frame
		var dx = player.x - self.x;
		var dy = player.y - self.y;
		var length = Math.sqrt(dx * dx + dy * dy);
		if (length > 0) {
			self.direction.x = dx / length;
			self.direction.y = dy / length;
		}
		self.x += self.direction.x * self.speed;
		self.y += self.direction.y * self.speed;
	};
	return self;
});
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.canShoot = false;
	return self;
});
var PowerupCrate = Container.expand(function () {
	var self = Container.call(this);
	var crateGraphics = self.attachAsset('powerupCrate', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.bobDirection = 1;
	self.bobSpeed = 0.5;
	self.baseY = 0;
	self.update = function () {
		// Simple bobbing animation
		self.y += self.bobDirection * self.bobSpeed;
		var distanceFromBase = Math.abs(self.y - self.baseY);
		if (distanceFromBase > 10) {
			self.bobDirection *= -1;
		}
	};
	return self;
});
var RhythmIndicator = Container.expand(function () {
	var self = Container.call(this);
	var rhythmBar = self.attachAsset('rhythmBar', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var perfectZone = self.attachAsset('perfectZone', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	perfectZone.alpha = 0.7;
	var indicator = self.attachAsset('rhythmIndicator', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	indicator.x = -200;
	self.beatDuration = 1000;
	self.startTime = 0;
	self.update = function () {
		var elapsed = LK.ticks * (1000 / 60) - self.startTime;
		var progress = elapsed % self.beatDuration / self.beatDuration;
		indicator.x = -200 + progress * 400;
		var perfectZoneStart = 150;
		var perfectZoneEnd = 250;
		var indicatorPos = 200 + indicator.x;
		if (indicatorPos >= perfectZoneStart && indicatorPos <= perfectZoneEnd) {
			player.canShoot = true;
			perfectZone.tint = 0x27AE60;
			// Make ground fully visible when in perfect zone
			tween(ground, {
				alpha: 1
			}, {
				duration: 100
			});
		} else {
			player.canShoot = false;
			perfectZone.tint = 0xE67E22;
			// Make ground semi-transparent when not in perfect zone
			tween(ground, {
				alpha: 0.3
			}, {
				duration: 100
			});
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x1A1A2E
});

/**** 
* Game Code
****/ 
// Create ground texture first to render below enemies
var ground = LK.getAsset('ground', {
	anchorX: 0.5,
	anchorY: 1
});
ground.x = 1024; // Center horizontally
ground.y = 2732; // Position at bottom of screen
// Scale ground to ensure it covers the full screen width
ground.scaleX = 2048 / ground.width; // Scale to cover full width
ground.scaleY = Math.max(1, 2732 / ground.height); // Scale to cover full height if needed
// Make ground semi-transparent initially
ground.alpha = 0.3;
game.addChild(ground);
var player = game.addChild(new Player());
player.x = 1024;
player.y = 2400;
var rhythmIndicator = new RhythmIndicator();
rhythmIndicator.x = 1024;
rhythmIndicator.y = 200;
rhythmIndicator.beatDuration = 600; // 100 BPM = 60000ms / 100 beats = 600ms per beat (synchronized with bgmusic)
rhythmIndicator.startTime = LK.ticks * (1000 / 60);
var enemies = [];
var goldenEnemies = [];
var explosiveEnemies = [];
var bullets = [];
var powerupCrates = [];
var spawnTimer = 0;
var goldenSpawnTimer = 0;
var explosiveSpawnTimer = 0;
var gameSpeed = 1;
var bulletCount = 10;
var maxBullets = 10;
var isReloading = false;
var reloadTimer = 0;
var shotgunMode = false;
var shotgunBulletCount = 1;
var bosses = [];
var comboCount = 0;
var lastShotWasPerfect = false;
var scoreTxt = new Text2('Score: 0', {
	size: 60,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
var rhythmTxt = new Text2('Hit the beat!', {
	size: 40,
	fill: 0x27AE60
});
rhythmTxt.anchor.set(0.5, 0);
rhythmTxt.y = 80;
LK.gui.top.addChild(rhythmTxt);
var ammoTxt = new Text2('Ammo: 10', {
	size: 80,
	fill: 0xFFFFFF
});
ammoTxt.anchor.set(0, 1);
LK.gui.bottomLeft.addChild(ammoTxt);
var comboTxt = new Text2('Combo: 0', {
	size: 60,
	fill: 0xFFD700
});
comboTxt.anchor.set(1, 1);
LK.gui.bottomRight.addChild(comboTxt);
function playRandomEnemyKillSound() {
	var killSounds = ['enemyKill', 'enemyKill2', 'enemyKill3', 'enemyKill4'];
	var randomSound = killSounds[Math.floor(Math.random() * killSounds.length)];
	LK.getSound(randomSound).play();
}
function spawnEnemy() {
	var enemy = new Enemy();
	// Only spawn from top
	enemy.x = Math.random() * 2048;
	enemy.y = -50;
	// Direction will be calculated in enemy.update() to continuously track player
	enemies.push(enemy);
	game.addChild(enemy);
}
function spawnGoldenEnemy() {
	var goldenEnemy = new GoldenEnemy();
	// Only spawn from top
	goldenEnemy.x = Math.random() * 2048;
	goldenEnemy.y = -50;
	// Direction will be calculated in goldenEnemy.update() to continuously track player
	goldenEnemies.push(goldenEnemy);
	game.addChild(goldenEnemy);
}
function spawnExplosiveEnemy() {
	var explosiveEnemy = new ExplosiveEnemy();
	// Only spawn from top
	explosiveEnemy.x = Math.random() * 2048;
	explosiveEnemy.y = -50;
	explosiveEnemies.push(explosiveEnemy);
	game.addChild(explosiveEnemy);
}
function spawnBoss() {
	// Starting from generation 5, spawn double bosses
	var bossesToSpawn = bossGeneration >= 5 ? 2 : 1;
	for (var b = 0; b < bossesToSpawn; b++) {
		var boss = new Boss(bossGeneration);
		// Spawn from top with some horizontal spacing for double bosses
		if (bossesToSpawn === 2) {
			boss.x = Math.random() * 1024 + b * 1024; // Split screen into two halves
		} else {
			boss.x = Math.random() * 2048;
		}
		boss.y = -500;
		bosses.push(boss);
		game.addChild(boss);
	}
	// Visual feedback for boss spawn
	LK.effects.flashScreen(0x8B0000, 1000);
	if (bossesToSpawn === 2) {
		rhythmTxt.setText('DOUBLE BOSS LV' + bossGeneration + ' INCOMING!');
	} else {
		rhythmTxt.setText('BOSS LV' + bossGeneration + ' INCOMING!');
	}
	rhythmTxt.tint = 0x8B0000;
	// Increase enemy spawn rate when boss appears
	gameSpeed += 0.5;
	// Increment boss generation for next spawn
	bossGeneration++;
}
function shootBullet(targetX, targetY) {
	if (bulletCount <= 0 || isReloading) {
		rhythmTxt.setText('Reloading...');
		rhythmTxt.tint = 0xFFFF00;
		return;
	}
	if (!player.canShoot) {
		rhythmTxt.setText('Wrong timing!');
		rhythmTxt.tint = 0xE74C3C;
		// Reset combo on wrong timing
		comboCount = 0;
		comboTxt.setText('Combo: ' + comboCount);
		lastShotWasPerfect = false;
		// Consume bullet even on wrong timing
		bulletCount--;
		ammoTxt.setText('Ammo: ' + bulletCount);
		// Add failure effect
		LK.effects.flashScreen(0xFF4444, 300);
		// Play miss sound
		LK.getSound('miss').play();
		// Check if need to reload
		if (bulletCount <= 0) {
			isReloading = true;
			reloadTimer = 120; // 2 seconds at 60 FPS 
			ammoTxt.setText('Reloading...');
			ammoTxt.tint = 0xFFFF00;
		}
		return;
	}
	rhythmTxt.setText('Perfect!');
	rhythmTxt.tint = 0x27AE60;
	// Increment combo count on perfect shot
	comboCount++;
	comboTxt.setText('Combo: ' + comboCount);
	lastShotWasPerfect = true;
	bulletCount--;
	ammoTxt.setText('Ammo: ' + bulletCount);
	if (bulletCount <= 0) {
		isReloading = true;
		reloadTimer = 120; // 2 seconds at 60 FPS 
		ammoTxt.setText('Reloading...');
		ammoTxt.tint = 0xFFFF00;
	}
	// Calculate base direction
	var dx = targetX - player.x;
	var dy = targetY - player.y;
	var length = Math.sqrt(dx * dx + dy * dy);
	var baseAngle = Math.atan2(dy, dx);
	// Check if we should create a guided bullet (every 5 combos) or redirect all bullets (every 10 combos)
	var shouldCreateGuided = comboCount > 0 && comboCount % 5 === 0 && lastShotWasPerfect;
	var shouldRedirectAll = comboCount > 0 && comboCount % 10 === 0 && lastShotWasPerfect;
	if (shotgunMode) {
		// Fire bullets based on accumulated shotgun count
		var totalBullets = shotgunBulletCount;
		var spreadRange = 0.8; // Total spread range in radians
		var angleStep = totalBullets > 1 ? spreadRange / (totalBullets - 1) : 0;
		var startAngle = baseAngle - spreadRange / 2;
		for (var s = 0; s < totalBullets; s++) {
			var bullet = new Bullet();
			bullet.x = player.x;
			bullet.y = player.y;
			var angle = totalBullets > 1 ? startAngle + s * angleStep : baseAngle;
			bullet.setDirection(Math.cos(angle), Math.sin(angle));
			// Assign random color to bullet
			var randomColors = [0xFF6B6B, 0x4ECDC4, 0x45B7D1, 0x96CEB4, 0xFECE7C, 0xF38BA8, 0xA8E6CF, 0xC7CEEA, 0xFFB3BA, 0xBAE1FF];
			var randomColor = randomColors[Math.floor(Math.random() * randomColors.length)];
			bullet.tint = randomColor;
			// Make first bullet guided if combo condition is met, or all bullets if combo 10
			if (s === 0 && shouldCreateGuided || shouldRedirectAll) {
				bullet.isGuided = true;
				// Visual feedback for guided bullet
				var bulletColor = shouldRedirectAll ? 0xFFD700 : 0x00FFFF; // Gold for combo 10, cyan for combo 5
				tween(bullet, {
					tint: bulletColor
				}, {
					duration: 200
				});
			}
			bullets.push(bullet);
			game.addChild(bullet);
		}
	} else {
		// Fire single bullet
		var bullet = new Bullet();
		bullet.x = player.x;
		bullet.y = player.y;
		bullet.setDirection(dx / length, dy / length);
		// Assign random color to bullet
		var randomColors = [0xFF6B6B, 0x4ECDC4, 0x45B7D1, 0x96CEB4, 0xFECE7C, 0xF38BA8, 0xA8E6CF, 0xC7CEEA, 0xFFB3BA, 0xBAE1FF];
		var randomColor = randomColors[Math.floor(Math.random() * randomColors.length)];
		bullet.tint = randomColor;
		// Make bullet guided if combo condition is met
		if (shouldCreateGuided || shouldRedirectAll) {
			bullet.isGuided = true;
			// Visual feedback for guided bullet
			var bulletColor = shouldRedirectAll ? 0xFFD700 : 0x00FFFF; // Gold for combo 10, cyan for combo 5
			tween(bullet, {
				tint: bulletColor
			}, {
				duration: 200
			});
		}
		bullets.push(bullet);
		game.addChild(bullet);
	}
	// Show special feedback for combo milestones
	if (shouldRedirectAll) {
		rhythmTxt.setText('ALL SHOTS GUIDED! Combo x' + comboCount);
		rhythmTxt.tint = 0xFFD700;
		LK.effects.flashScreen(0xFFD700, 500);
	} else if (shouldCreateGuided) {
		rhythmTxt.setText('GUIDED SHOT! Combo x' + comboCount);
		rhythmTxt.tint = 0x00FFFF;
		LK.effects.flashScreen(0x00FFFF, 300);
	}
	LK.getSound('shoot').play();
	// Add camera shake when shooting
	var shakeIntensity = shotgunMode ? shotgunBulletCount * 8 : 20;
	tween(game, {
		x: game.x + shakeIntensity
	}, {
		duration: 50,
		onFinish: function onFinish() {
			tween(game, {
				x: game.x - shakeIntensity * 2
			}, {
				duration: 50,
				onFinish: function onFinish() {
					tween(game, {
						x: 0
					}, {
						duration: 50
					});
				}
			});
		}
	});
}
game.down = function (x, y, obj) {
	shootBullet(x, y);
};
game.update = function () {
	spawnTimer++;
	goldenSpawnTimer++;
	explosiveSpawnTimer++;
	if (spawnTimer >= 120 / gameSpeed) {
		spawnEnemy();
		spawnTimer = 0;
	}
	// Spawn golden enemy every 10 seconds (600 ticks at 60 FPS)
	if (goldenSpawnTimer >= 600) {
		spawnGoldenEnemy();
		goldenSpawnTimer = 0;
	}
	// Spawn explosive enemy every 8 seconds (480 ticks at 60 FPS)
	if (explosiveSpawnTimer >= 480) {
		spawnExplosiveEnemy();
		explosiveSpawnTimer = 0;
	}
	// Update bullets
	for (var i = bullets.length - 1; i >= 0; i--) {
		var bullet = bullets[i];
		if (bullet.x < -50 || bullet.x > 2098 || bullet.y < -50 || bullet.y > 2782) {
			bullet.destroy();
			bullets.splice(i, 1);
			continue;
		}
		// Check bullet-enemy collisions
		for (var j = enemies.length - 1; j >= 0; j--) {
			var enemy = enemies[j];
			if (bullet.intersects(enemy)) {
				LK.setScore(LK.getScore() + 10);
				scoreTxt.setText('Score: ' + LK.getScore());
				// Add combo point for hitting enemy
				comboCount++;
				comboTxt.setText('Combo: ' + comboCount);
				LK.getSound('hit').play();
				playRandomEnemyKillSound();
				LK.effects.flashObject(enemy, 0xFFFFFF, 200);
				// Add camera shake when hitting enemy
				tween(game, {
					x: game.x + 12
				}, {
					duration: 30,
					onFinish: function onFinish() {
						tween(game, {
							x: game.x - 24
						}, {
							duration: 30,
							onFinish: function onFinish() {
								tween(game, {
									x: 0
								}, {
									duration: 30
								});
							}
						});
					}
				});
				bullet.destroy();
				bullets.splice(i, 1);
				enemy.destroy();
				enemies.splice(j, 1);
				break;
			}
		}
		// Check bullet-golden enemy collisions
		for (var j = goldenEnemies.length - 1; j >= 0; j--) {
			var goldenEnemy = goldenEnemies[j];
			if (bullet.intersects(goldenEnemy)) {
				goldenEnemy.health--;
				// Add combo point for hitting golden enemy
				comboCount++;
				comboTxt.setText('Combo: ' + comboCount);
				LK.getSound('hit').play();
				LK.effects.flashObject(goldenEnemy, 0xFFFFFF, 200);
				// Add camera shake when hitting golden enemy
				tween(game, {
					x: game.x + 16
				}, {
					duration: 35,
					onFinish: function onFinish() {
						tween(game, {
							x: game.x - 32
						}, {
							duration: 35,
							onFinish: function onFinish() {
								tween(game, {
									x: 0
								}, {
									duration: 35
								});
							}
						});
					}
				});
				bullet.destroy();
				bullets.splice(i, 1);
				if (goldenEnemy.health <= 0) {
					LK.setScore(LK.getScore() + 50);
					scoreTxt.setText('Score: ' + LK.getScore());
					playRandomEnemyKillSound();
					// Drop powerup crate at golden enemy position
					var crate = new PowerupCrate();
					crate.x = goldenEnemy.x;
					crate.y = goldenEnemy.y;
					crate.baseY = goldenEnemy.y;
					powerupCrates.push(crate);
					game.addChild(crate);
					goldenEnemy.destroy();
					goldenEnemies.splice(j, 1);
				} else {
					LK.setScore(LK.getScore() + 10);
					scoreTxt.setText('Score: ' + LK.getScore());
				}
				break;
			}
		}
		// Check bullet-explosive enemy collisions
		for (var j = explosiveEnemies.length - 1; j >= 0; j--) {
			var explosiveEnemy = explosiveEnemies[j];
			if (bullet.intersects(explosiveEnemy)) {
				explosiveEnemy.health--;
				// Add combo point for hitting explosive enemy
				comboCount++;
				comboTxt.setText('Combo: ' + comboCount);
				LK.getSound('hit').play();
				LK.effects.flashObject(explosiveEnemy, 0xFFFFFF, 200);
				// Add camera shake when hitting explosive enemy
				tween(game, {
					x: game.x + 18
				}, {
					duration: 35,
					onFinish: function onFinish() {
						tween(game, {
							x: game.x - 36
						}, {
							duration: 35,
							onFinish: function onFinish() {
								tween(game, {
									x: 0
								}, {
									duration: 35
								});
							}
						});
					}
				});
				bullet.destroy();
				bullets.splice(i, 1);
				if (explosiveEnemy.health <= 0) {
					LK.setScore(LK.getScore() + 30);
					scoreTxt.setText('Score: ' + LK.getScore());
					playRandomEnemyKillSound();
					explosiveEnemy.destroy();
					explosiveEnemies.splice(j, 1);
				} else {
					LK.setScore(LK.getScore() + 15);
					scoreTxt.setText('Score: ' + LK.getScore());
				}
				break;
			}
		}
		// Check bullet-boss collisions
		for (var j = bosses.length - 1; j >= 0; j--) {
			var boss = bosses[j];
			if (bullet.intersects(boss)) {
				boss.health--;
				boss.updateHealthBar(); // Update health bar immediately
				// Add combo point for hitting boss
				comboCount++;
				comboTxt.setText('Combo: ' + comboCount);
				LK.getSound('hit').play();
				LK.effects.flashObject(boss, 0xFFFFFF, 200);
				// Add camera shake when hitting boss
				tween(game, {
					x: game.x + 24
				}, {
					duration: 40,
					onFinish: function onFinish() {
						tween(game, {
							x: game.x - 48
						}, {
							duration: 40,
							onFinish: function onFinish() {
								tween(game, {
									x: 0
								}, {
									duration: 40
								});
							}
						});
					}
				});
				bullet.destroy();
				bullets.splice(i, 1);
				if (boss.health <= 0) {
					LK.setScore(LK.getScore() + 100);
					scoreTxt.setText('Score: ' + LK.getScore());
					playRandomEnemyKillSound();
					// Visual feedback for boss defeat
					LK.effects.flashScreen(0x00FF00, 800);
					rhythmTxt.setText('BOSS DEFEATED!');
					rhythmTxt.tint = 0x00FF00;
					boss.destroy();
					bosses.splice(j, 1);
				} else {
					LK.setScore(LK.getScore() + 20);
					scoreTxt.setText('Score: ' + LK.getScore());
				}
				break;
			}
		}
		// Check bullet-powerup crate collisions
		for (var j = powerupCrates.length - 1; j >= 0; j--) {
			var crate = powerupCrates[j];
			if (bullet.intersects(crate)) {
				// Check if we haven't reached the maximum of 2 crates
				var maxShotgunBullets = 9; // 3^2 = 9 (maximum 2 crates accumulated)
				if (shotgunBulletCount < maxShotgunBullets) {
					// Enable shotgun mode and triple bullet count
					shotgunMode = true;
					shotgunBulletCount *= 3;
					// Visual feedback
					LK.effects.flashScreen(0x8e44ad, 500);
					rhythmTxt.setText('Shotgun x' + shotgunBulletCount + '!');
					rhythmTxt.tint = 0x8e44ad;
				} else {
					// Maximum reached, show different feedback
					LK.effects.flashScreen(0xFFD700, 300);
					rhythmTxt.setText('Max Shotgun!');
					rhythmTxt.tint = 0xFFD700;
				}
				// Remove crate and bullet
				bullet.destroy();
				bullets.splice(i, 1);
				crate.destroy();
				powerupCrates.splice(j, 1);
				break;
			}
		}
	}
	// Update enemies
	for (var k = enemies.length - 1; k >= 0; k--) {
		var enemy = enemies[k];
		if (enemy.intersects(player)) {
			LK.effects.flashScreen(0xFF0000, 1000);
			LK.showGameOver();
			return;
		}
		if (enemy.x < -100 || enemy.x > 2148 || enemy.y < -100 || enemy.y > 2832) {
			enemy.destroy();
			enemies.splice(k, 1);
		}
	}
	// Update golden enemies
	for (var k = goldenEnemies.length - 1; k >= 0; k--) {
		var goldenEnemy = goldenEnemies[k];
		if (goldenEnemy.intersects(player)) {
			LK.effects.flashScreen(0xFF0000, 1000);
			LK.showGameOver();
			return;
		}
		if (goldenEnemy.x < -100 || goldenEnemy.x > 2148 || goldenEnemy.y < -100 || goldenEnemy.y > 2832) {
			goldenEnemy.destroy();
			goldenEnemies.splice(k, 1);
		}
	}
	// Update bosses
	for (var k = bosses.length - 1; k >= 0; k--) {
		var boss = bosses[k];
		if (boss.intersects(player)) {
			LK.effects.flashScreen(0xFF0000, 1000);
			LK.showGameOver();
			return;
		}
		if (boss.x < -200 || boss.x > 2248 || boss.y < -200 || boss.y > 2932) {
			boss.destroy();
			bosses.splice(k, 1);
		}
	}
	// Update explosive enemies
	for (var k = explosiveEnemies.length - 1; k >= 0; k--) {
		var explosiveEnemy = explosiveEnemies[k];
		if (explosiveEnemy.intersects(player)) {
			LK.effects.flashScreen(0xFF0000, 1000);
			LK.showGameOver();
			return;
		}
		if (explosiveEnemy.x < -100 || explosiveEnemy.x > 2148 || explosiveEnemy.y < -100 || explosiveEnemy.y > 2832) {
			explosiveEnemy.destroy();
			explosiveEnemies.splice(k, 1);
		}
	}
	// Update and cleanup powerup crates
	for (var k = powerupCrates.length - 1; k >= 0; k--) {
		var crate = powerupCrates[k];
		if (crate.x < -100 || crate.x > 2148 || crate.y < -100 || crate.y > 2832) {
			crate.destroy();
			powerupCrates.splice(k, 1);
		}
	}
	// Handle reloading
	if (isReloading) {
		reloadTimer--;
		if (reloadTimer <= 0) {
			bulletCount = maxBullets;
			isReloading = false;
			ammoTxt.setText('Ammo: ' + bulletCount);
			ammoTxt.tint = 0xFFFFFF;
		}
	}
	// Increase difficulty over time
	if (LK.getScore() > 0 && LK.getScore() % 100 === 0 && LK.ticks % 60 === 0) {
		gameSpeed += 0.1;
		rhythmIndicator.beatDuration = Math.max(600, rhythmIndicator.beatDuration - 50);
	}
};
// Add rhythm indicator last to ensure it renders above all other elements
game.addChild(rhythmIndicator);
// Ensure rhythm indicator stays on top of all enemies and ground
game.setChildIndex(rhythmIndicator, game.children.length - 1);
LK.playMusic('bgmusic');
;

===================================================================
--- original.js
+++ change.js
@@ -231,9 +231,9 @@
 			if (distance <= explosionRadius && enemy !== self) {
 				enemy.destroy();
 				enemies.splice(i, 1);
 				LK.setScore(LK.getScore() + 5);
-				LK.getSound('enemyKill').play();
+				playRandomEnemyKillSound();
 			}
 		}
 		// Damage nearby golden enemies
 		for (var i = goldenEnemies.length - 1; i >= 0; i--) {
@@ -244,9 +244,9 @@
 			if (distance <= explosionRadius) {
 				goldenEnemy.destroy();
 				goldenEnemies.splice(i, 1);
 				LK.setScore(LK.getScore() + 25);
-				LK.getSound('enemyKill').play();
+				playRandomEnemyKillSound();
 			}
 		}
 		// Damage nearby explosive enemies
 		for (var i = explosiveEnemies.length - 1; i >= 0; i--) {
@@ -257,9 +257,9 @@
 			if (distance <= explosionRadius && explosiveEnemy !== self) {
 				explosiveEnemy.destroy();
 				explosiveEnemies.splice(i, 1);
 				LK.setScore(LK.getScore() + 15);
-				LK.getSound('enemyKill').play();
+				playRandomEnemyKillSound();
 			}
 		}
 		// Damage nearby bosses
 		for (var i = 0; i < bosses.length; i++) {
@@ -490,8 +490,13 @@
 	fill: 0xFFD700
 });
 comboTxt.anchor.set(1, 1);
 LK.gui.bottomRight.addChild(comboTxt);
+function playRandomEnemyKillSound() {
+	var killSounds = ['enemyKill', 'enemyKill2', 'enemyKill3', 'enemyKill4'];
+	var randomSound = killSounds[Math.floor(Math.random() * killSounds.length)];
+	LK.getSound(randomSound).play();
+}
 function spawnEnemy() {
 	var enemy = new Enemy();
 	// Only spawn from top
 	enemy.x = Math.random() * 2048;
@@ -721,9 +726,9 @@
 				// Add combo point for hitting enemy
 				comboCount++;
 				comboTxt.setText('Combo: ' + comboCount);
 				LK.getSound('hit').play();
-				LK.getSound('enemyKill').play();
+				playRandomEnemyKillSound();
 				LK.effects.flashObject(enemy, 0xFFFFFF, 200);
 				// Add camera shake when hitting enemy
 				tween(game, {
 					x: game.x + 12
@@ -785,9 +790,9 @@
 				bullets.splice(i, 1);
 				if (goldenEnemy.health <= 0) {
 					LK.setScore(LK.getScore() + 50);
 					scoreTxt.setText('Score: ' + LK.getScore());
-					LK.getSound('enemyKill').play();
+					playRandomEnemyKillSound();
 					// Drop powerup crate at golden enemy position
 					var crate = new PowerupCrate();
 					crate.x = goldenEnemy.x;
 					crate.y = goldenEnemy.y;
@@ -837,9 +842,9 @@
 				bullets.splice(i, 1);
 				if (explosiveEnemy.health <= 0) {
 					LK.setScore(LK.getScore() + 30);
 					scoreTxt.setText('Score: ' + LK.getScore());
-					LK.getSound('enemyKill').play();
+					playRandomEnemyKillSound();
 					explosiveEnemy.destroy();
 					explosiveEnemies.splice(j, 1);
 				} else {
 					LK.setScore(LK.getScore() + 15);
@@ -883,9 +888,9 @@
 				bullets.splice(i, 1);
 				if (boss.health <= 0) {
 					LK.setScore(LK.getScore() + 100);
 					scoreTxt.setText('Score: ' + LK.getScore());
-					LK.getSound('enemyKill').play();
+					playRandomEnemyKillSound();
 					// Visual feedback for boss defeat
 					LK.effects.flashScreen(0x00FF00, 800);
 					rhythmTxt.setText('BOSS DEFEATED!');
 					rhythmTxt.tint = 0x00FF00;