/**** 
* Classes
****/ 
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.velocityX = 0;
	self.velocityY = 0;
	self.damage = 25;
	self.update = function () {
		self.x += self.velocityX;
		self.y += self.velocityY;
		// Remove if off screen
		if (self.x < -50 || self.x > 2098 || self.y < -50 || self.y > 2782) {
			var index = bullets.indexOf(self);
			if (index !== -1) {
				bullets.splice(index, 1);
			}
			self.destroy();
		}
	};
	return self;
});
var Coin = Container.expand(function () {
	var self = Container.call(this);
	var coinGraphics = self.attachAsset('coin', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.value = 10;
	self.lastPlayerDistance = Infinity;
	self.update = function () {
		var dx = player.x - self.x;
		var dy = player.y - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		// Collect coin if player is close
		if (self.lastPlayerDistance > 40 && distance <= 40) {
			player.coins += self.value;
			LK.getSound('coin').play();
			var index = coins.indexOf(self);
			if (index !== -1) {
				coins.splice(index, 1);
			}
			self.destroy();
		}
		self.lastPlayerDistance = distance;
	};
	return self;
});
// Game arrays
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.health = 100;
	self.maxHealth = 100;
	self.speed = 5;
	self.damage = 25;
	self.armor = 0;
	self.coins = 0;
	self.shootCooldown = 0;
	self.update = function () {
		if (self.shootCooldown > 0) {
			self.shootCooldown--;
		}
	};
	self.takeDamage = function (damage) {
		var actualDamage = Math.max(1, damage - self.armor);
		self.health -= actualDamage;
		if (self.health <= 0) {
			self.health = 0;
			LK.showGameOver();
		}
	};
	self.shoot = function (targetX, targetY) {
		if (self.shootCooldown > 0) return;
		var bullet = new Bullet();
		bullet.x = self.x;
		bullet.y = self.y;
		var dx = targetX - self.x;
		var dy = targetY - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		bullet.velocityX = dx / distance * 15;
		bullet.velocityY = dy / distance * 15;
		bullet.damage = self.damage;
		bullets.push(bullet);
		game.addChild(bullet);
		LK.getSound('shoot').play();
		self.shootCooldown = 10;
	};
	return self;
});
var Zombie = Container.expand(function () {
	var self = Container.call(this);
	var zombieGraphics = self.attachAsset('zombie', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.health = 50;
	self.maxHealth = 50;
	self.speed = 2;
	self.damage = 20;
	self.coinValue = 10;
	self.lastPlayerDistance = Infinity;
	self.update = function () {
		var dx = player.x - self.x;
		var dy = player.y - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance > 5) {
			self.x += dx / distance * self.speed;
			self.y += dy / distance * self.speed;
		}
		// Check collision with player
		if (self.lastPlayerDistance > 30 && distance <= 30) {
			player.takeDamage(self.damage);
			LK.getSound('hit').play();
		}
		self.lastPlayerDistance = distance;
	};
	self.takeDamage = function (damage) {
		self.health -= damage;
		if (self.health <= 0) {
			self.die();
		}
	};
	self.die = function () {
		var coin = new Coin();
		coin.x = self.x;
		coin.y = self.y;
		coin.value = self.coinValue;
		coins.push(coin);
		game.addChild(coin);
		var index = zombies.indexOf(self);
		if (index !== -1) {
			zombies.splice(index, 1);
		}
		self.destroy();
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x2a2a2a
});

/**** 
* Game Code
****/ 
// Sounds
// Coins
// Bullets
// Zombies
// Player character
// Game arrays
var zombies = [];
var bullets = [];
var coins = [];
// Game variables
var waveNumber = 1;
var zombiesPerWave = 5;
var spawnTimer = 0;
var zombiesSpawned = 0;
// Create player
var player = game.addChild(new Player());
player.x = 1024;
player.y = 1366;
// UI Elements
var healthText = new Text2('Health: 100/100', {
	size: 40,
	fill: 0xFF0000
});
healthText.anchor.set(0, 0);
LK.gui.topLeft.addChild(healthText);
healthText.x = 120;
healthText.y = 20;
var coinsText = new Text2('Coins: 0', {
	size: 40,
	fill: 0xFFD700
});
coinsText.anchor.set(0, 0);
LK.gui.topRight.addChild(coinsText);
coinsText.x = -200;
coinsText.y = 20;
var waveText = new Text2('Wave: 1', {
	size: 40,
	fill: 0xFFFFFF
});
waveText.anchor.set(0.5, 0);
LK.gui.top.addChild(waveText);
waveText.y = 20;
// Touch controls
var touchStartX = 0;
var touchStartY = 0;
var isMoving = false;
game.down = function (x, y, obj) {
	touchStartX = x;
	touchStartY = y;
	isMoving = true;
	// Auto-shoot at touch position
	player.shoot(x, y);
};
game.move = function (x, y, obj) {
	if (isMoving) {
		var dx = x - touchStartX;
		var dy = y - touchStartY;
		var newX = player.x + dx * 0.5;
		var newY = player.y + dy * 0.5;
		// Keep player within bounds
		player.x = Math.max(30, Math.min(2018, newX));
		player.y = Math.max(30, Math.min(2702, newY));
		touchStartX = x;
		touchStartY = y;
	}
};
game.up = function (x, y, obj) {
	isMoving = false;
};
// Game update loop
game.update = function () {
	// Update UI
	healthText.setText('Health: ' + player.health + '/' + player.maxHealth);
	coinsText.setText('Coins: ' + player.coins);
	waveText.setText('Wave: ' + waveNumber);
	// Spawn zombies
	if (zombiesSpawned < zombiesPerWave) {
		spawnTimer++;
		if (spawnTimer >= 60) {
			// Spawn every second
			spawnTimer = 0;
			spawnZombie();
			zombiesSpawned++;
		}
	} else if (zombies.length === 0) {
		// Start next wave
		waveNumber++;
		zombiesPerWave += 2;
		zombiesSpawned = 0;
	}
	// Check bullet-zombie collisions
	for (var i = bullets.length - 1; i >= 0; i--) {
		var bullet = bullets[i];
		var bulletHit = false;
		for (var j = zombies.length - 1; j >= 0; j--) {
			var zombie = zombies[j];
			if (bullet.intersects(zombie)) {
				zombie.takeDamage(bullet.damage);
				bullets.splice(i, 1);
				bullet.destroy();
				bulletHit = true;
				break;
			}
		}
	}
};
function spawnZombie() {
	var zombie = new Zombie();
	// Spawn at random edge of screen
	var side = Math.floor(Math.random() * 4);
	switch (side) {
		case 0:
			// Top
			zombie.x = Math.random() * 2048;
			zombie.y = -50;
			break;
		case 1:
			// Right
			zombie.x = 2098;
			zombie.y = Math.random() * 2732;
			break;
		case 2:
			// Bottom
			zombie.x = Math.random() * 2048;
			zombie.y = 2782;
			break;
		case 3:
			// Left
			zombie.x = -50;
			zombie.y = Math.random() * 2732;
			break;
	}
	zombie.health += (waveNumber - 1) * 10; // Increase health with waves
	zombie.maxHealth = zombie.health;
	zombie.coinValue += Math.floor((waveNumber - 1) * 2);
	zombies.push(zombie);
	game.addChild(zombie);
}

===================================================================
--- original.js
+++ change.js
@@ -153,14 +153,14 @@
 
 /**** 
 * Game Code
 ****/ 
-// Game arrays
-// Player character
-// Zombies
-// Bullets
-// Coins
 // Sounds
+// Coins
+// Bullets
+// Zombies
+// Player character
+// Game arrays
 var zombies = [];
 var bullets = [];
 var coins = [];
 // Game variables