===================================================================
--- original.js
+++ change.js
@@ -1,13 +1,7 @@
-var PowerUp = Container.expand(function () {
-	var self = Container.call(this);
-	var powerUpGraphics = LK.getAsset('powerUp', 'Power Up Graphics', 0.5, 0.5);
-	self.addChild(powerUpGraphics);
-	self.speed = 2;
-	self.move = function () {
-		self.y += self.speed;
-	};
-});
+/**** 
+* Classes
+****/
 var HeroBullet = Container.expand(function () {
 	var self = Container.call(this);
 	var bulletGraphics = LK.getAsset('heroBullet', 'Hero Bullet Graphics', 0.5, 0.5);
 	self.addChild(bulletGraphics);
@@ -41,10 +35,14 @@
 		if (self.y < self.targetY) {
 			self.y += self.speed;
 		}
 		self.x += Math.sin(LK.ticks / 30) * 5;
-		if (self.x < 0) self.x = 0;
-		if (self.x > 2048 - enemyGraphics.width) self.x = 2048 - enemyGraphics.width;
+		if (self.x < 0) {
+			self.x = 0;
+		}
+		if (self.x > 2048 - enemyGraphics.width) {
+			self.x = 2048 - enemyGraphics.width;
+		}
 	};
 });
 var StarField = Container.expand(function () {
 	var self = Container.call(this);
@@ -61,189 +59,165 @@
 			self.alpha = self.speed / 3;
 		}
 	};
 });
-var Game = Container.expand(function () {
-	var self = Container.call(this);
-	var starField = [];
-	for (var i = 0; i < 100; i++) {
-		var star = new StarField();
-		star.x = Math.random() * 2048;
-		star.y = Math.random() * 2732;
-		starField.push(star);
-		self.addChild(star);
+
+/**** 
+* Initialize Game
+****/
+var game = new LK.Game({
+	backgroundColor: 0x000000
+});
+
+/**** 
+* Game Code
+****/
+var starField = [];
+for (var i = 0; i < 100; i++) {
+	var star = new StarField();
+	star.x = Math.random() * 2048;
+	star.y = Math.random() * 2732;
+	starField.push(star);
+	game.addChild(star);
+}
+var hero = game.addChild(new Hero());
+hero.x = 1024;
+hero.y = 2400;
+var enemies = [];
+var heroBullets = [];
+var enemyBullets = [];
+var score = 0;
+var currentWave = 0;
+var allEnemiesKilled = true;
+var scoreText = new Text2('0', {
+	size: 100,
+	font: "'GillSans-Bold',Impact,'Arial Black',Tahoma",
+	fill: "#ffffff"
+});
+scoreText.anchor.set(0.5, 0);
+LK.gui.topCenter.addChild(scoreText);
+function spawnWave() {
+	for (var i = 0; i < currentWave + 3; i++) {
+		var enemy = new Enemy();
+		enemy.x = Math.random() * 2048;
+		enemy.y = -100 - i * 100;
+		enemies.push(enemy);
+		game.addChild(enemy);
 	}
-	var hero = self.addChild(new Hero());
-	hero.x = 1024;
-	hero.y = 2400;
-	var enemies = [];
-	var heroBullets = [];
-	var enemyBullets = [];
-	var powerUps = [];
-	var powerUpTimer = 0;
-	var score = 0;
-	var currentWave = 0;
-	var allEnemiesKilled = true;
-	var scoreText = new Text2('0', {
-		size: 100,
-		font: "'GillSans-Bold',Impact,'Arial Black',Tahoma",
-		fill: "#ffffff"
+	allEnemiesKilled = false;
+}
+function fireHeroBullet() {
+	var bullet = new HeroBullet();
+	bullet.x = hero.x;
+	bullet.y = hero.y - 50;
+	heroBullets.push(bullet);
+	game.addChild(bullet);
+}
+function fireEnemyBullet(enemy) {
+	var bullet = new EnemyBullet();
+	bullet.x = enemy.x;
+	bullet.y = enemy.y + 50;
+	var angle = Math.atan2(hero.y - bullet.y, hero.x - bullet.x);
+	bullet.speedX = bullet.speed * Math.cos(angle);
+	bullet.speedY = bullet.speed * Math.sin(angle);
+	enemyBullets.push(bullet);
+	game.addChild(bullet);
+}
+function updateGameObjects() {
+	enemies.forEach(function (enemy, index) {
+		enemy.move();
+		if (enemy.y > 2732) {
+			enemy.destroy();
+			enemies.splice(index, 1);
+		}
 	});
-	scoreText.anchor.set(0.5, 0);
-	LK.gui.topCenter.addChild(scoreText);
-	function spawnWave() {
-		for (var i = 0; i < currentWave + 3; i++) {
-			var enemy = new Enemy();
-			enemy.x = Math.random() * 2048;
-			enemy.y = -100 - i * 100;
-			enemies.push(enemy);
-			self.addChild(enemy);
+	heroBullets.forEach(function (bullet, index) {
+		bullet.move();
+		if (bullet.y < 0) {
+			bullet.destroy();
+			heroBullets.splice(index, 1);
 		}
-		allEnemiesKilled = false;
-	}
-	function fireHeroBullet() {
-		if (powerUpTimer > 0) {
-			var bullet1 = new HeroBullet();
-			bullet1.x = hero.x - 20;
-			bullet1.y = hero.y - 50;
-			heroBullets.push(bullet1);
-			self.addChild(bullet1);
-			var bullet2 = new HeroBullet();
-			bullet2.x = hero.x + 20;
-			bullet2.y = hero.y - 50;
-			heroBullets.push(bullet2);
-			self.addChild(bullet2);
-		} else {
-			var bullet = new HeroBullet();
-			bullet.x = hero.x;
-			bullet.y = hero.y - 50;
-			heroBullets.push(bullet);
-			self.addChild(bullet);
+	});
+	enemyBullets.forEach(function (bullet, index) {
+		bullet.move();
+		if (bullet.y > 2732) {
+			bullet.destroy();
+			enemyBullets.splice(index, 1);
 		}
-	}
-	function fireEnemyBullet(enemy) {
-		var bullet = new EnemyBullet();
-		bullet.x = enemy.x;
-		bullet.y = enemy.y + 50;
-		var angle = Math.atan2(hero.y - bullet.y, hero.x - bullet.x);
-		bullet.speedX = bullet.speed * Math.cos(angle);
-		bullet.speedY = bullet.speed * Math.sin(angle);
-		enemyBullets.push(bullet);
-		self.addChild(bullet);
-	}
-	function updateGameObjects() {
-		enemies.forEach(function (enemy, index) {
-			enemy.move();
-			if (enemy.y > 2732) {
+	});
+}
+function checkCollisions() {
+	// Check collisions between hero bullets and enemies
+	heroBullets.forEach(function (heroBullet, hIndex) {
+		enemies.forEach(function (enemy, eIndex) {
+			if (heroBullet.intersects(enemy)) {
+				heroBullet.destroy();
+				heroBullets.splice(hIndex, 1);
 				enemy.destroy();
-				enemies.splice(index, 1);
-			}
-		});
-		heroBullets.forEach(function (bullet, index) {
-			bullet.move();
-			if (bullet.y < 0) {
-				bullet.destroy();
-				heroBullets.splice(index, 1);
-			}
-		});
-		enemyBullets.forEach(function (bullet, index) {
-			bullet.move();
-			if (bullet.y > 2732) {
-				bullet.destroy();
-				enemyBullets.splice(index, 1);
-			}
-		});
-	}
-	function checkCollisions() {
-		heroBullets.forEach(function (heroBullet, hIndex) {
-			enemies.forEach(function (enemy, eIndex) {
-				if (heroBullet.intersects(enemy)) {
-					heroBullet.destroy();
-					heroBullets.splice(hIndex, 1);
-					enemy.destroy();
-					enemies.splice(eIndex, 1);
-					score += 100;
-					scoreText.setText(score);
-					if (enemies.length === 0) {
-						allEnemiesKilled = true;
-					}
+				enemies.splice(eIndex, 1);
+				score += 100;
+				scoreText.setText(score);
+				if (enemies.length === 0) {
+					allEnemiesKilled = true;
 				}
-			});
-		});
-		enemyBullets.forEach(function (enemyBullet, index) {
-			if (enemyBullet.intersects(hero)) {
-				enemyBullet.destroy();
-				enemyBullets.splice(index, 1);
-				LK.showGameOver();
 			}
 		});
-	}
-	var targetPosition = {
-		x: hero.x,
-		y: hero.y
-	};
-	stage.on('down', function (obj) {
-		targetPosition = obj.event.getLocalPosition(self);
 	});
-	stage.on('move', function (obj) {
-		targetPosition = obj.event.getLocalPosition(self);
-	});
-	function moveHeroTowardsTarget() {
-		var dx = targetPosition.x - hero.x;
-		var dy = targetPosition.y - hero.y;
-		var distance = Math.sqrt(dx * dx + dy * dy);
-		var maxSpeed = 15;
-		if (distance > maxSpeed) {
-			var angle = Math.atan2(dy, dx);
-			hero.x += maxSpeed * Math.cos(angle);
-			hero.y += maxSpeed * Math.sin(angle);
-		} else {
-			hero.x = targetPosition.x;
-			hero.y = targetPosition.y;
+
+	// Check collisions between enemy bullets and hero
+	enemyBullets.forEach(function (enemyBullet, index) {
+		if (enemyBullet.intersects(hero)) {
+			enemyBullet.destroy();
+			enemyBullets.splice(index, 1);
+			LK.showGameOver();
+			// Handle hero hit by enemy bullet
 		}
+	});
+}
+var targetPosition = {
+	x: hero.x,
+	y: hero.y
+};
+game.on('down', function (obj) {
+	targetPosition = obj.event.getLocalPosition(game);
+});
+game.on('move', function (obj) {
+	targetPosition = obj.event.getLocalPosition(game);
+});
+function moveHeroTowardsTarget() {
+	var dx = targetPosition.x - hero.x;
+	var dy = targetPosition.y - hero.y;
+	var distance = Math.sqrt(dx * dx + dy * dy);
+	var maxSpeed = 15;
+	if (distance > maxSpeed) {
+		var angle = Math.atan2(dy, dx);
+		hero.x += maxSpeed * Math.cos(angle);
+		hero.y += maxSpeed * Math.sin(angle);
+	} else {
+		hero.x = targetPosition.x;
+		hero.y = targetPosition.y;
 	}
-	function handleTick() {
-		moveHeroTowardsTarget();
-		updateGameObjects();
-		checkCollisions();
-		starField.forEach(function (star) {
-			star.move();
-		});
-		if (allEnemiesKilled) {
-			currentWave++;
-			spawnWave();
+}
+function handleTick() {
+	moveHeroTowardsTarget();
+	updateGameObjects();
+	checkCollisions();
+	starField.forEach(function (star) {
+		star.move();
+	});
+	if (allEnemiesKilled) {
+		currentWave++;
+		spawnWave();
+	}
+	if (LK.ticks % 15 === 0) {
+		fireHeroBullet();
+	}
+	enemies.forEach(function (enemy, index) {
+		if (LK.ticks % 90 === 0) {
+			fireEnemyBullet(enemy);
 		}
-		if (LK.ticks % 600 === 0) {
-			var powerUp = new PowerUp();
-			powerUp.x = Math.random() * 2048;
-			powerUp.y = -100;
-			powerUps.push(powerUp);
-			self.addChild(powerUp);
+		if (LK.ticks % 180 === 0 && index % 2 === 0) {
+			fireEnemyBullet(enemy);
 		}
-		if (powerUpTimer > 0) {
-			powerUpTimer--;
-		}
-		if (LK.ticks % 30 === 0) {
-			fireHeroBullet();
-		}
-		powerUps.forEach(function (powerUp, index) {
-			powerUp.move();
-			if (powerUp.y > 2732) {
-				powerUp.destroy();
-				powerUps.splice(index, 1);
-			} else if (powerUp.intersects(hero)) {
-				powerUp.destroy();
-				powerUps.splice(index, 1);
-				powerUpTimer = 300;
-			}
-		});
-		enemies.forEach(function (enemy, index) {
-			if (LK.ticks % 90 === 0) {
-				fireEnemyBullet(enemy);
-			}
-			if (LK.ticks % 180 === 0 && index % 2 === 0) {
-				fireEnemyBullet(enemy);
-			}
-		});
-	}
-	LK.on('tick', handleTick);
-});
+	});
+}
+LK.on('tick', handleTick);
\ No newline at end of file