I hated the way the passwords in Frank the Fruit Fly were kind of "guessable." So I changed it. If you wanted 99% health, the first and third letters were "k". But now it isn't like that. It now varies with each level password, making for a more random look if one were to look at the 99% health codes list. Granted, they're still K's, but they're now in different places, and hey, who is going to begin each level with 99% health, anyway?
I could have gone the route I did for Quest of the Cranberry for the Channel F and its password system, but I figure I would have a hard time trying to code it similar, even since e5frog had to help me with it at that. That and the passwords are really long (10 characters) in that game. So that's what I'm doing.