/**** 
* Classes
****/
var StarParticles = Container.expand(function () {
	var self = Container.call(this);
	self.particles = [];
	for (var i = 0; i < 100; i++) {
		var particle = self.attachAsset('dot', {
			anchorX: 0.5,
			anchorY: 0.5
		});
		particle.x = 0;
		particle.y = 0;
		var angle = Math.random() * Math.PI * 2;
		var speed = Math.random() * 5 + 2;
		particle.velocityX = Math.cos(angle) * speed;
		particle.velocityY = Math.sin(angle) * speed;
		self.particles.push(particle);
	}
	self.update = function () {
		for (var i = 0; i < self.particles.length; i++) {
			var particle = self.particles[i];
			particle.x += particle.velocityX;
			particle.y += particle.velocityY;
			particle.alpha -= 0.01;
			if (particle.alpha <= 0) {
				self.removeChild(particle);
				self.particles.splice(i, 1);
				i--;
			}
		}
		if (self.particles.length === 0) {
			self.destroy();
		}
	};
});
var Dot = Container.expand(function () {
	var self = Container.call(this);
	var dotGraphics = self.attachAsset('dot', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.velocityY = 0;
	self.gravity = 0.5;
	self.bounce = -15;
	self.update = function () {
		var previousY = self.y;
		self.velocityY += self.gravity;
		self.y += self.velocityY;
		if (self.y > 2732 - self.height / 2) {
			self.velocityY = self.bounce;
		}
		self.movedDistance = self.y - previousY;
	};
	self.bounceUp = function () {
		self.velocityY = self.bounce;
	};
});
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	var obstacleGraphics = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.direction = Math.random() < 0.5 ? -1 : 1;
	self.speed = (Math.random() * 3 + 5) * self.direction;
	self.rotationSpeed = 0.05;
	self.rotation = 0;
	self.move = function () {
		self.x += self.speed;
		self.rotation += self.rotationSpeed;
		obstacleGraphics.rotation = self.rotation;
		if (self.direction === 1 && self.x > 2048 + self.width / 2 || self.direction === -1 && self.x < -self.width / 2) {
			self.direction *= -1;
			self.speed *= -1;
			self.y = Math.random() * (2732 - self.height) + self.height / 2;
		}
	};
	self.moveDown = function (distance) {
		self.y += distance;
		if (self.y > 2732 - self.height / 2) {
			self.y = -self.height / 2;
		}
	};
});
var Star = Container.expand(function () {
	var self = Container.call(this);
	var starGraphics = self.attachAsset('star', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.moveDown = function (distance) {
		self.y += distance;
		if (self.y > 2732 - self.height / 2) {
			self.y = -self.height / 2;
		}
	};
});

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

/**** 
* Game Code
****/
var dot = game.addChild(new Dot());
dot.x = 2048 / 2;
dot.y = 2732 - dot.height / 2;
var obstacles = [];
for (var i = 0; i < 5; i++) {
	var obstacle = game.addChild(new Obstacle());
	obstacle.x = obstacle.direction === 1 ? -obstacle.width / 2 : 2048 + obstacle.width / 2;
	obstacle.y = Math.random() * (1366 - obstacle.height) + obstacle.height / 2;
	obstacles.push(obstacle);
}
var scoreTxt = new Text2('0', {
	size: 150,
	fill: "#ffffff"
});
scoreTxt.anchor.set(0.5, 0);
scoreTxt.x = 2048 / 2;
scoreTxt.y = 50;
LK.gui.top.addChild(scoreTxt);
game.on('down', function (obj) {
	dot.bounceUp();
});
LK.on('tick', function () {
	dot.update();
	for (var i = 0; i < obstacles.length; i++) {
		obstacles[i].move();
		if (dot.y < 1200 && dot.movedDistance < 0) {
			// If the dot moved up and its y position is less than 1400
			obstacles[i].moveDown(-dot.movedDistance);
		}
		if (dot.intersects(obstacles[i])) {
			LK.showGameOver();
		}
	}
	// Update score based on the dot's survival time
	var currentScore = Math.floor(LK.ticks / 60);
	LK.setScore(currentScore);
	scoreTxt.setText(LK.getScore().toString());
});
var stars = [];
var star = game.addChild(new Star());
star.x = 2048 / 2;
star.y = 2732 / 2;
stars.push(star);
LK.on('tick', function () {
	dot.update();
	for (var i = 0; i < obstacles.length; i++) {
		obstacles[i].move();
		if (dot.y < 1200 && dot.movedDistance < 0) {
			obstacles[i].moveDown(-dot.movedDistance);
		}
		if (dot.intersects(obstacles[i])) {
			LK.showGameOver();
		}
	}
	for (var j = stars.length - 1; j >= 0; j--) {
		if (dot.intersects(stars[j])) {
			LK.setScore(LK.getScore() + 1);
			scoreTxt.setText(LK.getScore().toString());
			var oldStarY = stars[j].y;
			stars[j].destroy();
			stars.splice(j, 1);
			var newStar = game.addChild(new Star());
			newStar.x = 2048 / 2;
			newStar.y = oldStarY - 1500;
			stars.push(newStar);
		} else if (dot.y < 1200 && dot.movedDistance < 0) {
			stars[j].moveDown(-dot.movedDistance);
		}
	}
	var currentScore = Math.floor(LK.ticks / 60);
	LK.setScore(currentScore);
	scoreTxt.setText(LK.getScore().toString());
});

===================================================================
--- original.js
+++ change.js
@@ -1,7 +1,40 @@
 /**** 
 * Classes
 ****/
+var StarParticles = Container.expand(function () {
+	var self = Container.call(this);
+	self.particles = [];
+	for (var i = 0; i < 100; i++) {
+		var particle = self.attachAsset('dot', {
+			anchorX: 0.5,
+			anchorY: 0.5
+		});
+		particle.x = 0;
+		particle.y = 0;
+		var angle = Math.random() * Math.PI * 2;
+		var speed = Math.random() * 5 + 2;
+		particle.velocityX = Math.cos(angle) * speed;
+		particle.velocityY = Math.sin(angle) * speed;
+		self.particles.push(particle);
+	}
+	self.update = function () {
+		for (var i = 0; i < self.particles.length; i++) {
+			var particle = self.particles[i];
+			particle.x += particle.velocityX;
+			particle.y += particle.velocityY;
+			particle.alpha -= 0.01;
+			if (particle.alpha <= 0) {
+				self.removeChild(particle);
+				self.particles.splice(i, 1);
+				i--;
+			}
+		}
+		if (self.particles.length === 0) {
+			self.destroy();
+		}
+	};
+});
 var Dot = Container.expand(function () {
 	var self = Container.call(this);
 	var dotGraphics = self.attachAsset('dot', {
 		anchorX: 0.5,
@@ -55,23 +88,14 @@
 	var starGraphics = self.attachAsset('star', {
 		anchorX: 0.5,
 		anchorY: 0.5
 	});
-	self.scale = 1;
-	self.scaleDirection = 1;
 	self.moveDown = function (distance) {
 		self.y += distance;
 		if (self.y > 2732 - self.height / 2) {
 			self.y = -self.height / 2;
 		}
 	};
-	self.update = function () {
-		self.scale += 0.01 * self.scaleDirection;
-		if (self.scale > 1.2 || self.scale < 0.8) {
-			self.scaleDirection *= -1;
-		}
-		starGraphics.scale.set(self.scale);
-	};
 });
 
 /**** 
 * Initialize Game
@@ -137,9 +161,8 @@
 			LK.showGameOver();
 		}
 	}
 	for (var j = stars.length - 1; j >= 0; j--) {
-		stars[j].update();
 		if (dot.intersects(stars[j])) {
 			LK.setScore(LK.getScore() + 1);
 			scoreTxt.setText(LK.getScore().toString());
 			var oldStarY = stars[j].y;