At the title menu you can press the tabulator key to open a command prompt, where you can input the following cheat codes (note that one of them ends with a blank):
- "Message-ID": infinite lives
- "-- ": infinite protection
- "Hamster": infinite Magic Potions
- "Killfile": infinite Rubies
- "ROT13": infinite Swappers
The catches: Cheating disables permanent save of progress as well as the high score feature, of course. You cannot have multiple cheats active at the same time. Cheats will automatically become inactive when you return to the title menu.