THE BAD:
The worst thing about this game is the weird, disturbing, and annoying music, and, of course people who like good stories won't like this game one bit, since it doesn't really HAVE a story! The gameplay can get way too hard at times, and dying and having to restart is really a pain, but it won't bother you if you're having fun just playing.
SUMMARY:
In total it's a game for puzzle players, and mathemeticians (sp?). If you like the genre I think you'll like this, if you're not sure, try renting it first. Good luck!