===================================================================
--- original.js
+++ change.js
@@ -3,9 +3,8 @@
 ****/ 
 // Enemy class
 var Enemy = Container.expand(function () {
 	var self = Container.call(this);
-	self.health = 2;
 	var enemyGraphics = self.attachAsset('enemy', {
 		anchorX: 0.5,
 		anchorY: 0.5
 	});
@@ -61,10 +60,23 @@
 		bullet.x = self.x;
 		bullet.y = self.y - heroGraphics.height / 2;
 		game.addChild(bullet);
 		heroBullets.push(bullet);
+		if (self.doubleBullets) {
+			var bullet2 = new HeroBullet();
+			bullet2.x = self.x + 50;
+			bullet2.y = self.y - heroGraphics.height / 2;
+			game.addChild(bullet2);
+			heroBullets.push(bullet2);
+		}
 		LK.getSound('Shoot').play();
 	};
+	self.powerUp = function () {
+		self.doubleBullets = true;
+		LK.setTimeout(function () {
+			self.doubleBullets = false;
+		}, 10000);
+	};
 });
 // HeroBullet class
 var HeroBullet = Container.expand(function () {
 	var self = Container.call(this);
@@ -80,8 +92,24 @@
 			heroBullets.splice(heroBullets.indexOf(self), 1);
 		}
 	};
 });
+// PowerUp class
+var PowerUp = Container.expand(function () {
+	var self = Container.call(this);
+	var powerUpGraphics = self.attachAsset('powerUp', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 5;
+	self.update = function () {
+		self.y += self.speed;
+		if (self.y > 2732 + powerUpGraphics.height / 2) {
+			self.destroy();
+			powerUps.splice(powerUps.indexOf(self), 1);
+		}
+	};
+});
 
 /**** 
 * Initialize Game
 ****/ 
@@ -91,12 +119,20 @@
 
 /**** 
 * Game Code
 ****/ 
+function spawnPowerUp() {
+	var powerUp = new PowerUp();
+	powerUp.x = Math.random() * 2048;
+	powerUp.y = -powerUp.height / 2;
+	game.addChild(powerUp);
+	powerUps.push(powerUp);
+}
 var hero;
 var enemies = [];
 var heroBullets = [];
 var enemyBullets = [];
+var powerUps = [];
 var score = 0;
 var scoreTxt = new Text2('0', {
 	size: 150,
 	fill: "#ffffff"
@@ -121,8 +157,11 @@
 game.update = function () {
 	if (LK.ticks % 60 == 0) {
 		spawnEnemy();
 	}
+	if (LK.ticks % 600 == 0) {
+		spawnPowerUp();
+	}
 	for (var i = heroBullets.length - 1; i >= 0; i--) {
 		heroBullets[i].update();
 	}
 	for (var i = enemies.length - 1; i >= 0; i--) {
@@ -136,17 +175,14 @@
 	}
 	for (var i = heroBullets.length - 1; i >= 0; i--) {
 		for (var j = enemies.length - 1; j >= 0; j--) {
 			if (heroBullets[i].intersects(enemies[j])) {
-				enemies[j].health--;
-				if (enemies[j].health <= 0) {
-					score++;
-					scoreTxt.setText(score);
-					enemies[j].destroy();
-					enemies.splice(j, 1);
-				}
+				score++;
+				scoreTxt.setText(score);
 				heroBullets[i].destroy();
+				enemies[j].destroy();
 				heroBullets.splice(i, 1);
+				enemies.splice(j, 1);
 				break;
 			}
 		}
 	}
@@ -163,5 +199,13 @@
 hero.y = 2732 - 200;
 game.addChild(hero);
 LK.setInterval(function () {
 	hero.shoot();
-}, 500);
\ No newline at end of file
+}, 500);
+for (var i = powerUps.length - 1; i >= 0; i--) {
+	powerUps[i].update();
+	if (powerUps[i].intersects(hero)) {
+		powerUps[i].destroy();
+		powerUps.splice(i, 1);
+		hero.powerUp();
+	}
+}
\ No newline at end of file