Control ball movement:
Press?ESC and press?J?at the “Exit” prompt. The cursor keys can now be used to move the ball when game play resumes.

Bonus ball:
Start game play and press?ESC, then type?ball.

Multi-ball:
Press?ESC,?B,?N to get a multi-ball.

Screen border:
Press?ESC,?F9 for a screen border.