Click the ball or press Space bar to launch the ball. Each time the ball hits a wall you lose some points for that level. You get bonus for avoiding all the walls in a level. When you see a paddle, you can click and drag or use the left and right arrow keys to change the angle of the paddle.

Hover over or use the up and down arrow keys to select a paddle. Change the angle of the paddle by clicking and dragging or using the left and right arrow keys. Launch the ball by clicking on it or pressing space bar.