===================================================================
--- original.js
+++ change.js
@@ -27,9 +27,28 @@
 	self.move = function (x, y) {
 		self.x = x;
 		self.y = y;
 	};
+	self.shoot = function () {
+		var newRay = new HeroRay();
+		newRay.x = self.x;
+		newRay.y = self.y;
+		heroRays.push(newRay);
+		game.addChild(newRay);
+	};
 });
+// HeroRay class
+var HeroRay = Container.expand(function () {
+	var self = Container.call(this);
+	var rayGraphics = self.attachAsset('heroRay', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = -5;
+	self.move = function () {
+		self.y += self.speed;
+	};
+});
 // NeonGreenBall class
 var NeonGreenBall = Container.expand(function () {
 	var self = Container.call(this);
 	var ballGraphics = self.attachAsset('neonGreenBall', {
@@ -70,8 +89,9 @@
 // Touch event to move hero and destroy neon green balls
 game.on('down', function (obj) {
 	var pos = obj.event.getLocalPosition(game);
 	hero.move(pos.x, pos.y);
+	hero.shoot();
 	for (var i = neonGreenBalls.length - 1; i >= 0; i--) {
 		if (hero.intersects(neonGreenBalls[i])) {
 			neonGreenBalls[i].destroy();
 			neonGreenBalls.splice(i, 1);
@@ -79,18 +99,36 @@
 	}
 });
 // Global variables
 var neonGreenBalls = [];
+var heroRays = [];
 // Game tick event
 LK.on('tick', function () {
-	// Move neon green balls
+	// Move neon green balls and hero rays
 	for (var i = neonGreenBalls.length - 1; i >= 0; i--) {
 		neonGreenBalls[i].move();
 		if (neonGreenBalls[i].y > 2732) {
 			neonGreenBalls[i].destroy();
 			neonGreenBalls.splice(i, 1);
 		}
 	}
+	for (var i = heroRays.length - 1; i >= 0; i--) {
+		heroRays[i].move();
+		if (heroRays[i].y < 0) {
+			heroRays[i].destroy();
+			heroRays.splice(i, 1);
+		}
+		for (var j = neonGreenBalls.length - 1; j >= 0; j--) {
+			if (heroRays[i] && heroRays[i].intersects(neonGreenBalls[j])) {
+				neonGreenBalls[j].destroy();
+				neonGreenBalls.splice(j, 1);
+				heroRays[i].destroy();
+				heroRays.splice(i, 1);
+				LK.setScore(LK.getScore() + 1);
+				scoreTxt.setText(LK.getScore());
+			}
+		}
+	}
 	// Spawn neon green balls
 	if (LK.ticks % 60 == 0) {
 		var newBall = new NeonGreenBall();
 		newBall.x = Math.random() * 2048;