GRAVITY FORCE:

        Instead of the normal level password enter "WARPnn".  Substitute a
        level number for 'nn'.

        Actual Passwords:

        Level 5  - AGNUS
        Level 10 - PARSEC
        Level 15 - CRYSTAL
        Level 20 - REACTOR
        Level 25 - VISION
        Level 30 - ORBIT
        Level 35 - PALACE
        Level 40 - ALIEN
        Level 45 - FALCON
        Level 50 - WARPXX