===================================================================
--- original.js
+++ change.js
@@ -49,8 +49,28 @@
 			self.destroy();
 		}
 	};
 });
+var Spike = Container.expand(function () {
+	var self = Container.call(this);
+	var spikeGraphics = self.attachAsset('spike', {
+		width: 20,
+		height: 20,
+		color: 0x000000,
+		shape: 'box',
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speedX = Math.random() * 10 - 5;
+	self.speedY = Math.random() * 10 - 5;
+	self.update = function () {
+		self.x += self.speedX;
+		self.y += self.speedY;
+		if (self.x < 0 || self.x > 2048 || self.y < 0 || self.y > 2732) {
+			self.destroy();
+		}
+	};
+});
 
 /**** 
 * Initialize Game
 ****/ 
@@ -80,8 +100,15 @@
 	var explosion = new Explosion();
 	explosion.x = x;
 	explosion.y = y;
 	game.addChild(explosion);
+	// Launch spikes in random directions
+	for (var i = 0; i < 10; i++) {
+		var spike = new Spike();
+		spike.x = x;
+		spike.y = y;
+		game.addChild(spike);
+	}
 	// Destroy nearby balloons
 	for (var i = balloons.length - 1; i >= 0; i--) {
 		if (Math.abs(balloons[i].x - x) < 200 && Math.abs(balloons[i].y - y) < 200) {
 			balloons[i].destroy();
@@ -97,8 +124,24 @@
 		if (balloons[i].y < -100) {
 			balloons.splice(i, 1);
 		}
 	}
+	// Update spikes
+	var spikes = game.children.filter(function (child) {
+		return child instanceof Spike;
+	});
+	for (var i = spikes.length - 1; i >= 0; i--) {
+		spikes[i].update();
+		// Check for collision with balloons
+		for (var j = balloons.length - 1; j >= 0; j--) {
+			if (spikes[i].intersects(balloons[j])) {
+				balloons[j].destroy();
+				balloons.splice(j, 1);
+				score++;
+				scoreTxt.setText(score);
+			}
+		}
+	}
 	if (LK.ticks % 60 == 0) {
 		spawnBalloon();
 	}
 };