You must guide the ball so that it does not hit the spikes and explode. The top and bottom edges of the screen are completely covered with spikes, while spikes on the side walls appear and disappear. You need to direct the ball so that it hits the wall without touching these spikes. Each time the ball touches a wall, you earn one point. The game will get harder with every level — the number of spikes will increase and so will the ball's speed. Also, every few seconds a heart will appear on the screen; you can use these hearts to buy items in the shop.