When the "Activision" logo appears hold down the keys 'Alt', 'Ctrl', 'S' (or it may be '5'), and 'U', which should give you infinite energy for levels 1 & 2, but not for 3. This also stops the cable from breaking on Level 1. Press 'Fire' to begin the game.

Turn your Amiga on, wait for the hand to appear, then insert disk TWO. The hand will disappear, and then come back. Now insert disk one. During game play press 'Enter' on the numeric keypad to advance a level.