/**** 
* Classes
****/ 
// Define a class for bullets
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -10;
	self.update = function () {
		self.y += self.speed;
		if (self.y < 0) {
			self.destroy();
		}
	};
});
// Define a class for enemies
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 5;
	self.update = function () {
		self.y += self.speed;
		if (self.y > 2732) {
			self.destroy();
		}
	};
});
//<Assets used in the game will automatically appear here>
// Define a class for the player character
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 10;
	self.update = function () {
		// Player update logic
	};
	self.move = function (x, y) {
		self.x = x;
		self.y = y;
	};
});
// Define a class for powerups
var Powerup = Container.expand(function () {
	var self = Container.call(this);
	var powerupGraphics = self.attachAsset('powerup', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 5;
	self.update = function () {
		self.y += self.speed;
		if (self.y > 2732) {
			self.destroy();
		}
	};
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000000 //Init game with black background
});

/**** 
* Game Code
****/ 
var background = game.attachAsset('background', {
	anchorX: 0.0,
	anchorY: 0.0
});
// Initialize player
var player = game.addChild(new Player());
player.x = 2048 / 2;
player.y = 2732 - 200;
// Initialize arrays for enemies and bullets
var enemies = [];
var bullets = [];
var powerups = [];
// Function to spawn enemies
function spawnEnemy() {
	var enemy = new Enemy();
	enemy.x = Math.random() * 2048;
	enemy.y = -50;
	enemies.push(enemy);
	game.addChild(enemy);
}
// Function to shoot bullets
function shootBullet() {
	var bullet = new Bullet();
	bullet.x = player.x;
	bullet.y = player.y;
	bullets.push(bullet);
	game.addChild(bullet);
}
function spawnPowerup() {
	var powerup = new Powerup();
	powerup.x = Math.random() * 2048;
	powerup.y = -50;
	powerups.push(powerup);
	game.addChild(powerup);
}
// Handle player movement
game.move = function (x, y, obj) {
	player.move(x, y);
};
// Handle shooting
game.down = function (x, y, obj) {
	shootBullet();
};
// Update game state
game.update = function () {
	// Update enemies
	for (var i = enemies.length - 1; i >= 0; i--) {
		enemies[i].update();
		if (enemies[i].intersects(player)) {
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
		}
	}
	// Update bullets
	for (var j = bullets.length - 1; j >= 0; j--) {
		bullets[j].update();
		for (var k = enemies.length - 1; k >= 0; k--) {
			if (bullets[j].intersects(enemies[k])) {
				bullets[j].destroy();
				enemies[k].destroy();
				bullets.splice(j, 1);
				enemies.splice(k, 1);
				break;
			}
		}
	}
	// Update powerups
	for (var l = powerups.length - 1; l >= 0; l--) {
		powerups[l].update();
		if (powerups[l].intersects(player)) {
			powerups[l].destroy();
			powerups.splice(l, 1);
			// Add powerup effect here
		}
	}
	// Spawn enemies and powerups periodically
	if (LK.ticks % 60 == 0) {
		spawnEnemy();
		if (Math.random() < 0.1) {
			spawnPowerup();
		}
	}
};

===================================================================
--- original.js
+++ change.js
@@ -67,14 +67,18 @@
 /**** 
 * Initialize Game
 ****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000 //Init game with black background 
+	backgroundColor: 0x000000 //Init game with black background
 });
 
 /**** 
 * Game Code
 ****/ 
+var background = game.attachAsset('background', {
+	anchorX: 0.0,
+	anchorY: 0.0
+});
 // Initialize player
 var player = game.addChild(new Player());
 player.x = 2048 / 2;
 player.y = 2732 - 200;