I love this game. It so simple and easy to play, yet intuitive and addictive with a hidden layer of depth. Admittedly, there are only two big problems I have with it:
1. Not enough neon colors to choose from. (I'd like to see a Red wheel, or an Orange wheel. Heck, maybe even a White wheel.)
2. Not enough flavor in the kinds of arenas to choose from. (Adding ones with additional bottomless pits or obstacles would make things much more interesting.)
Otherwise, this is an amazing game, and I hope that I get to see a sequel at some point.
Overall, I think this game is pretty good. There are a few things that concern me (such as the strange manner in which the cars drift), but I think that they're all just minor points.
4/5 Overall, I can thoroughly say that I enjoyed myself while playing this game. There is, however, one major complaint I have, and that has to deal with combining-passwords mechanic: There's nothing hinted at to the player in the game towards the correct procedure of combining passwords. Other than that, it's a fantastic game, and really shows an optimistic side to the idea of an AI system wanting to achieve his/her/its purpose whilst having an existence in a world that is blind to the things that it can see as clearly as daylight.
I really wish we had more games like this; the world really does need this kind of wake-up call/special message.