/**** 
* Classes
****/ 
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -5;
	self.update = function () {
		self.y += self.speed;
	};
});
//<Assets used in the game will automatically appear here>
//<Write imports for supported plugins here>
// Class for the shooting ball
var ShootingBall = Container.expand(function () {
	var self = Container.call(this);
	var ballGraphics = self.attachAsset('shootingBall', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.update = function () {
		if (LK.ticks % 30 == 0) {
			// Every half a second
			var bullet = new Bullet();
			bullet.x = self.x;
			bullet.y = self.y;
			game.addChild(bullet);
		}
	};
});
// Class for the small balls
var SmallBall = Container.expand(function () {
	var self = Container.call(this);
	var ballGraphics = self.attachAsset('smallBall', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 3;
	self.update = function () {
		self.y += self.speed;
		if (self.y > 2732) {
			self.y = 0; // Reset position if it goes off screen
		}
	};
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000000 //Init game with black background 
});

/**** 
* Game Code
****/ 
var shootingBall = game.addChild(new ShootingBall());
shootingBall.x = 2048 / 2;
shootingBall.y = 2732 / 2;
var smallBalls = [];
for (var i = 0; i < 5; i++) {
	var smallBall = new SmallBall();
	smallBall.x = Math.random() * 2048;
	smallBall.y = Math.random() * 2732;
	smallBalls.push(smallBall);
	game.addChild(smallBall);
}
var dragNode = null;
//Declare method for handling move events on game.
function handleMove(x, y, obj) {
	//Get event position in relation to game object
	if (dragNode) {
		dragNode.x = x;
		dragNode.y = y;
	}
}
//Mouse or touch move on game object. LK returns complex event objects. Please be aware of this.
game.move = handleMove;
//Allow dragging of the shootingBall to start from anywhere.
game.down = function (x, y, obj) {
	//Set drag node to shootingBall. 
	dragNode = shootingBall;
	//Also call move handler right away to make effect instant.
	handleMove(x, y, obj);
};
//Mouse or touch up on game object
game.up = function (x, y, obj) {
	dragNode = null;
};
var bullets = [];
game.update = function () {
	for (var i = smallBalls.length - 1; i >= 0; i--) {
		for (var j = bullets.length - 1; j >= 0; j--) {
			if (bullets[j].intersects(smallBalls[i])) {
				smallBalls[i].destroy();
				smallBalls.splice(i, 1);
				bullets[j].destroy();
				bullets.splice(j, 1);
				LK.effects.flashScreen(0xff0000, 1000); // Add explosion effect
				if (smallBalls.length === 0) {
					LK.showGameOver(); // Win condition
				}
				break;
			}
		}
	}
};

===================================================================
--- original.js
+++ change.js
@@ -98,8 +98,9 @@
 				smallBalls[i].destroy();
 				smallBalls.splice(i, 1);
 				bullets[j].destroy();
 				bullets.splice(j, 1);
+				LK.effects.flashScreen(0xff0000, 1000); // Add explosion effect
 				if (smallBalls.length === 0) {
 					LK.showGameOver(); // Win condition
 				}
 				break;