You can guide Bally using your paddle.
When he touches down on the paddle he will bounce away.
The direction of his movement is controlled by the angle of the paddle.

You can place the paddle anywhere on the screen simply by clicking somewhere with the mouse and dragging a line with the cursor.
Let go of the mouse button when you want the paddle to stay in place where you put it.

The length of the paddle also affects the way Bally will bounce off: The longer the paddle, the more powerful it's impulse will be.
A long paddle may send Bally flying away with a high speed, whereas a short paddle will only give him a slight nudge.