Cheat Mode:
Type Zvmo!EG as a password (use upper and lower case exactly as shown).

Tips:
- All puzzles can be solved without losing a life.
- Look before you leap. Think about how the screen will look from a flipped perspective.
- Make sure you have enough switches, at least 10 per screen. It is possible to get stuck on a downward slope with no way to get back up, and the only way out is to press ESC and start over.

Level Codes:
Level 06 - IVEs8AZ?
Level 11 - dynle1cJ

(Source: Postcard Man, 1991)