/**** 
* Classes
****/
var Torch = Container.expand(function () {
	var self = Container.call(this);
	var torchGraphics = self.createAsset('torch', 'Hero torch', 0.5, 0.5);
	self.update = function () {
		// Update the torch position to follow the hero
		self.x = hero.x;
		self.y = hero.y;
	};
});
// Create and add the torch to the game
// Define the Hero class
var Hero = Container.expand(function () {
	var self = Container.call(this);
	var heroGraphics = self.createAsset('hero', 'Hero character', 0.5, 0.5);
	self.speed = 5;
	self.shoot = function () {
		var bullet = new HeroBullet();
		bullet.x = self.x;
		bullet.y = self.y;
		game.addChild(bullet);
		bullets.push(bullet);
	};
	self.move = function (direction) {
		self.x += direction.x * self.speed;
		self.y += direction.y * self.speed;
	};
});
// Define the HeroBullet class
var HeroBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.createAsset('heroBullet', 'Hero bullet', 0.5, 1);
	self.speed = -10;
	self.move = function () {
		self.y += self.speed;
	};
});
// Define the Zombie class
var Zombie = Container.expand(function () {
	var self = Container.call(this);
	var zombieGraphics = self.createAsset('realisticZombie', 'Realistic Zombie enemy', 0.5, 0.5);
	self.speed = 1;
	self.move = function () {
		self.y += self.speed;
	};
});

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

/**** 
* Game Code
****/
// Create and add the torch to the game
// Initialize important asset arrays
var torch = game.addChild(new Torch());
// Removed document keydown event listener and replaced with touch controls
// Touch controls will be implemented in the game's tick event
// Add keyboard event listener for hero shooting
// Space bar key code is 32
document.addEventListener('keydown', function (event) {
	if (event.keyCode === 32) {
		hero.shoot();
	}
});
var bullets = [];
var zombies = [];
var hero;
var isGameOver = false;
// Create the hero
hero = game.addChild(new Hero());
hero.x = 2048 / 2;
hero.y = 2732 - 100; // Position hero near the bottom of the screen
// Game logic and event handlers
LK.on('tick', function () {
	torch.update();
	if (isGameOver) {
		LK.showGameOver();
		return;
	}
	// Move bullets and check for off-screen
	for (var i = bullets.length - 1; i >= 0; i--) {
		bullets[i].move();
		if (bullets[i].y < 0) {
			bullets[i].destroy();
			bullets.splice(i, 1);
		}
	}
	// Move zombies and check for collision with hero
	for (var j = zombies.length - 1; j >= 0; j--) {
		zombies[j].move();
		if (zombies[j].y > 2732) {
			zombies[j].destroy();
			zombies.splice(j, 1);
		} else if (zombies[j].intersects(hero)) {
			isGameOver = true;
		}
	}
	// Spawn zombies
	if (LK.ticks % 120 == 0) {
		// Spawn a zombie every 2 seconds
		var zombie = new Zombie();
		zombie.x = Math.random() * 2048;
		zombie.y = -50; // Start off-screen
		zombies.push(zombie);
		game.addChild(zombie);
	}
});

===================================================================
--- original.js
+++ change.js
@@ -59,33 +59,10 @@
 ****/
 // Create and add the torch to the game
 // Initialize important asset arrays
 var torch = game.addChild(new Torch());
-document.addEventListener('keydown', function (event) {
-	var direction = {
-		x: 0,
-		y: 0
-	};
-	switch (event.keyCode) {
-		case 37:
-			// Left arrow
-			direction.x = -1;
-			break;
-		case 39:
-			// Right arrow
-			direction.x = 1;
-			break;
-		case 38:
-			// Up arrow
-			direction.y = -1;
-			break;
-		case 40:
-			// Down arrow
-			direction.y = 1;
-			break;
-	}
-	hero.move(direction);
-});
+// Removed document keydown event listener and replaced with touch controls
+// Touch controls will be implemented in the game's tick event
 // Add keyboard event listener for hero shooting
 // Space bar key code is 32
 document.addEventListener('keydown', function (event) {
 	if (event.keyCode === 32) {