===================================================================
--- original.js
+++ change.js
@@ -1,20 +1,4 @@
-var PowerUp = Container.expand(function () {
-	var self = Container.call(this);
-	var powerUpGraphics = LK.getAsset('powerUp', 'PowerUp Graphics', 0.5, 0.5);
-	self.addChild(powerUpGraphics);
-	self.speed = 3;
-	self.move = function () {
-		self.y += self.speed;
-		if (self.y > 2732) {
-			self.destroy();
-		}
-	};
-	self.activate = function (hero) {
-		hero.poweredUp = true;
-		hero.powerUpTimer = 300;
-	};
-});
 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);
@@ -36,10 +20,8 @@
 var Hero = Container.expand(function () {
 	var self = Container.call(this);
 	var heroGraphics = LK.getAsset('hero', 'Hero Spaceship', 0.5, 0.5);
 	self.addChild(heroGraphics);
-	self.poweredUp = false;
-	self.powerUpTimer = 0;
 });
 var Enemy = Container.expand(function () {
 	var self = Container.call(this);
 	var enemyGraphics = LK.getAsset('enemy', 'Enemy Spaceship', 0.5, 0.5);
@@ -107,24 +89,13 @@
 		}
 		allEnemiesKilled = false;
 	}
 	function fireHeroBullet() {
-		if (hero.poweredUp) {
-			var bulletLeft = new HeroBullet();
-			var bulletRight = new HeroBullet();
-			bulletLeft.x = hero.x - 20;
-			bulletRight.x = hero.x + 20;
-			bulletLeft.y = bulletRight.y = hero.y - 50;
-			heroBullets.push(bulletLeft, bulletRight);
-			self.addChild(bulletLeft);
-			self.addChild(bulletRight);
-		} else {
-			var bullet = new HeroBullet();
-			bullet.x = hero.x;
-			bullet.y = hero.y - 50;
-			heroBullets.push(bullet);
-			self.addChild(bullet);
-		}
+		var bullet = new HeroBullet();
+		bullet.x = hero.x;
+		bullet.y = hero.y - 50;
+		heroBullets.push(bullet);
+		self.addChild(bullet);
 	}
 	function fireEnemyBullet(enemy) {
 		var bullet = new EnemyBullet();
 		bullet.x = enemy.x;
@@ -212,19 +183,13 @@
 		checkCollisions();
 		starField.forEach(function (star) {
 			star.move();
 		});
-		if (hero.powerUpTimer > 0) {
-			hero.powerUpTimer--;
-			if (hero.powerUpTimer === 0) {
-				hero.poweredUp = false;
-			}
-		}
 		if (allEnemiesKilled) {
 			currentWave++;
 			spawnWave();
 		}
-		if (LK.ticks % 30 === 0) {
+		if (LK.ticks % 15 === 0) {
 			fireHeroBullet();
 		}
 		enemies.forEach(function (enemy, index) {
 			if (LK.ticks % 90 === 0) {