===================================================================
--- original.js
+++ change.js
@@ -1,4 +1,13 @@
+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;
+	};
+});
 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);
@@ -68,8 +77,10 @@
 	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', {
@@ -89,13 +100,26 @@
 		}
 		allEnemiesKilled = false;
 	}
 	function fireHeroBullet() {
-		var bullet = new HeroBullet();
-		bullet.x = hero.x;
-		bullet.y = hero.y - 50;
-		heroBullets.push(bullet);
-		self.addChild(bullet);
+		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);
+		}
 	}
 	function fireEnemyBullet(enemy) {
 		var bullet = new EnemyBullet();
 		bullet.x = enemy.x;
@@ -187,11 +211,32 @@
 		if (allEnemiesKilled) {
 			currentWave++;
 			spawnWave();
 		}
-		if (LK.ticks % 15 === 0) {
+		if (LK.ticks % 600 === 0) {
+			var powerUp = new PowerUp();
+			powerUp.x = Math.random() * 2048;
+			powerUp.y = -100;
+			powerUps.push(powerUp);
+			self.addChild(powerUp);
+		}
+		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);
 			}