I'm a bad girl, haven't registered yet. The game just bugs you with silly poems to register after 500 games or so.
The puzzle mode has 50 levels I think. My boyfriend beat it, but I saved a game and just stopped playing it after awhile. I prefer to play the "evil" levels
I've also got a baaaaaad addiction to Bust-a-move '99 for the N64. That game caused me to skip soooo many sociology classes my soph year. I'd go over to my boyfriend's place and play his roomate's 64. And just "forget" about class. I finally bought my own N64 and copy of the game.
I've thought of getting a PS2 just for Super Bust-A-Move!