/**** 
* Classes
****/ 
// 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;
	};
});
// 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
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);
};
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 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
@@ -54,11 +54,13 @@
 var Star = Container.expand(function () {
 	var self = Container.call(this);
 	var starGraphics = self.attachAsset('star', {
 		anchorX: 0.5,
-		anchorY: 0.5
+		anchorY: 0.5,
+		scaleX: Math.random() * 0.5 + 0.5,
+		scaleY: Math.random() * 0.5 + 0.5
 	});
-	self.speed = 1;
+	self.speed = Math.random() * 3 + 1;
 	self.update = function () {
 		self.y += self.speed;
 		if (self.y > 2732) {
 			self.y = -100;
@@ -81,9 +83,9 @@
 var spaceship = game.addChild(new Spaceship());
 spaceship.x = 1024;
 spaceship.y = 2400;
 var stars = [];
-for (var i = 0; i < 100; i++) {
+for (var i = 0; i < 200; i++) {
 	var star = new Star();
 	star.x = Math.random() * 2048;
 	star.y = Math.random() * -2732;
 	stars.push(star);