/**** 
* 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 < 0) {
			self.destroy();
		}
	};
});
// Obstacle class
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	var obstacleGraphics = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 5;
	self.update = function () {
		self.y += self.speed;
		if (self.y > 2732) {
			self.y = -100;
			self.x = Math.random() * 2048;
		}
	};
});
// PowerUp class
var PowerUp = Container.expand(function () {
	var self = Container.call(this);
	var powerUpGraphics = self.attachAsset('powerUp', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.update = function () {
		self.y += 3;
		if (self.y > 2732) {
			self.y = -100;
			self.x = Math.random() * 2048;
		}
	};
});
//<Assets used in the game will automatically appear here>
//<Write imports for supported plugins here>
// Spaceship class
var Spaceship = Container.expand(function () {
	var self = Container.call(this);
	var spaceshipGraphics = self.attachAsset('spaceship', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 10;
	self.update = function () {
		// Spaceship update logic
	};
	self.move = function (x, y) {
		self.x = x;
		self.y = y;
	};
	self.shoot = function () {
		var bullet = new Bullet();
		bullet.x = self.x;
		bullet.y = self.y;
		game.addChild(bullet);
	};
});
// Star class
var Star = Container.expand(function () {
	var self = Container.call(this);
	var starGraphics = self.attachAsset('star', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: Math.random() * 0.5 + 0.5,
		scaleY: Math.random() * 0.5 + 0.5
	});
	self.speed = Math.random() * 3 + 1;
	self.update = function () {
		self.y += self.speed;
		if (self.y > 2732) {
			self.y = -100;
			self.x = Math.random() * 2048;
		}
	};
});

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

/**** 
* Game Code
****/ 
// Initialize game elements
if (!spaceship) {
	var spaceship = game.addChild(new Spaceship());
	spaceship.x = 1024;
	spaceship.y = 2400;
}
var stars = [];
for (var i = 0; i < 200; i++) {
	var star = new Star();
	star.x = Math.random() * 2048;
	star.y = Math.random() * -2732;
	stars.push(star);
	game.addChild(star);
}
var obstacles = [];
for (var i = 0; i < 5; i++) {
	var obstacle = new Obstacle();
	obstacle.x = Math.random() * 2048;
	obstacle.y = Math.random() * -2732;
	obstacles.push(obstacle);
	game.addChild(obstacle);
}
var powerUps = [];
for (var i = 0; i < 3; i++) {
	var powerUp = new PowerUp();
	powerUp.x = Math.random() * 2048;
	powerUp.y = Math.random() * -2732;
	powerUps.push(powerUp);
	game.addChild(powerUp);
}
// Handle game events
game.down = function (x, y, obj) {
	spaceship.move(x, y);
	spaceship.shoot();
};
game.update = function () {
	for (var i = 0; i < obstacles.length; i++) {
		obstacles[i].update();
		if (spaceship.intersects(obstacles[i])) {
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
		}
		for (var j = 0; j < game.children.length; j++) {
			if (game.children[j] instanceof Bullet && game.children[j].intersects(obstacles[i])) {
				obstacles[i].destroy();
				obstacles.splice(i, 1);
				game.children[j].destroy();
				break;
			}
		}
	}
	for (var i = 0; i < stars.length; i++) {
		stars[i].update();
	}
	for (var i = 0; i < powerUps.length; i++) {
		powerUps[i].update();
		if (spaceship.intersects(powerUps[i])) {
			LK.setScore(LK.getScore() + 10);
			powerUps[i].destroy();
			powerUps.splice(i, 1);
		}
	}
};

===================================================================
--- original.js
+++ change.js
@@ -100,11 +100,13 @@
 /**** 
 * Game Code
 ****/ 
 // Initialize game elements
-var spaceship = game.addChild(new Spaceship());
-spaceship.x = 1024;
-spaceship.y = 2400;
+if (!spaceship) {
+	var spaceship = game.addChild(new Spaceship());
+	spaceship.x = 1024;
+	spaceship.y = 2400;
+}
 var stars = [];
 for (var i = 0; i < 200; i++) {
 	var star = new Star();
 	star.x = Math.random() * 2048;