Type "hidden test" during game play. You can now click and drag the mouse to control the ball.
Press one of the following keys to activate the debug function. 

Result                               Key	
-----------------------------------------
Display and edit high-score table  - H
Display current system memory      - M
Increase game ranking              - R
Display frame rate in title bar    - Y
Immediately get new ball           - B
Low fuel                           - [F12]
Field multiplier increases         - [F11]
Space Cadet" to "Pinball"          - Windows