/**** 
* Classes
****/ 
// Define the Bullet class
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -15;
	self.update = function () {
		self.y += self.speed;
		if (self.y < 0) {
			self.destroy();
		}
	};
});
// Define the Enemy class
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 the Player class
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;
	};
});

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

/**** 
* Game Code
****/ 
// Initialize player
var player = new Player();
player.x = 2048 / 2;
player.y = 2732 - 200;
game.addChild(player);
// Initialize enemies array
var enemies = [];
// Initialize bullets array
var bullets = [];
// 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 - 50;
	bullets.push(bullet);
	game.addChild(bullet);
}
// 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 player
	player.update();
	// 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;
			}
		}
	}
	// Spawn enemies periodically
	if (LK.ticks % 60 == 0) {
		spawnEnemy();
	}
};

===================================================================
--- original.js
+++ change.js
@@ -47,16 +47,8 @@
 		self.x = x;
 		self.y = y;
 	};
 });
-// Define the Tree class
-var Tree = Container.expand(function () {
-	var self = Container.call(this);
-	var treeGraphics = self.attachAsset('tree', {
-		anchorX: 0.5,
-		anchorY: 1
-	});
-});
 
 /**** 
 * Initialize Game
 ****/ 
@@ -71,13 +63,8 @@
 var player = new Player();
 player.x = 2048 / 2;
 player.y = 2732 - 200;
 game.addChild(player);
-// Initialize tree
-var tree = new Tree();
-tree.x = 2048 / 2;
-tree.y = 2732 - 400;
-game.addChild(tree);
 // Initialize enemies array
 var enemies = [];
 // Initialize bullets array
 var bullets = [];