/**** 
* Classes
****/ 
// 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 = -10;
	self.update = function () {
		self.y += self.speed;
		if (self.y < -self.height) {
			self.destroy();
		}
	};
});
// 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 = 2;
	self.update = function () {
		self.y += self.speed;
		if (self.y > 2732) {
			self.y = -self.height;
		}
	};
});
// Hero class
var Hero = Container.expand(function () {
	var self = Container.call(this);
	var heroGraphics = self.attachAsset('hero', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 5;
	self.update = function () {
		// Hero update logic
		self.vy = (self.vy || 0) + 0.5; // gravity
		self.y += self.vy;
		for (var i = 0; i < platforms.length; i++) {
			if (self.intersects(platforms[i]) && self.vy > 0) {
				self.y = platforms[i].y - self.height / 2;
				self.vy = 0;
			}
		}
	};
	self.down = function (x, y, obj) {
		self.vy = -10; // jump
	};
	self.move = function (x, y, obj) {
		// Add movement logic here
	};
});
//<Assets used in the game will automatically appear here>
// Platform class
var Platform = Container.expand(function () {
	var self = Container.call(this);
	var platformGraphics = self.attachAsset('platform', {
		anchorX: 0.5,
		anchorY: 0.5
	});
});

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

/**** 
* Game Code
****/ 
// Initialize platforms
var platforms = [];
for (var i = 0; i < 5; i++) {
	var platform = new Platform();
	platform.x = Math.random() * 2048;
	platform.y = Math.random() * 2732;
	platforms.push(platform);
	game.addChild(platform);
}
// Initialize hero
var hero = new Hero();
hero.x = 2048 / 2;
hero.y = 2732 - 200;
game.addChild(hero);
// Initialize enemies
var enemies = [];
for (var i = 0; i < 5; i++) {
	var enemy = new Enemy();
	enemy.x = Math.random() * 2048;
	enemy.y = Math.random() * -2732;
	enemies.push(enemy);
	game.addChild(enemy);
}
// Initialize bullets array
var bullets = [];
// Handle game move event
game.move = function (x, y, obj) {
	hero.move(x, y, obj);
};
// Handle game down event
game.down = function (x, y, obj) {
	var bullet = new Bullet();
	bullet.x = hero.x;
	bullet.y = hero.y;
	bullets.push(bullet);
	game.addChild(bullet);
};
// Game update function
game.update = function () {
	// Update hero
	hero.update();
	// Update enemies
	for (var i = 0; i < enemies.length; i++) {
		enemies[i].update();
		if (hero.intersects(enemies[i])) {
			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();
				bullets.splice(j, 1);
				enemies[k].destroy();
				enemies.splice(k, 1);
				break;
			}
		}
	}
};

===================================================================
--- original.js
+++ change.js
@@ -52,8 +52,11 @@
 	};
 	self.down = function (x, y, obj) {
 		self.vy = -10; // jump
 	};
+	self.move = function (x, y, obj) {
+		// Add movement logic here
+	};
 });
 //<Assets used in the game will automatically appear here>
 // Platform class
 var Platform = Container.expand(function () {