Don't Download this game or you will never use the rest of your XBOX 360!
2 main 'story' modes and numerous scenarios make OKX a game you can play for a long, long, long (add quite a few more long's) time. The controls and gameplay are pretty simple, but after the first couple of missions on either mode, the difficulty increases greatly. But it's to late by then, because you are hooked.
Graphics and sound aren't anything special, cute characters and voices but nothing exciting.
Just remember, you can download the DEMO free with your 360, and the full game costs about $10.00 (US), what else can you get for $10 that will entertain you for weeks on end?