Pretty decent game. I don't like that the car can just flip all over the place at any time. I like the level design, how you can go through the bridge for an alternate route and pass through rings. I like the upgrades, and the level backgrounds. Menu's can seem sorta cramped and frantic, though.
out of 10...
gfx - 8 (cool backgrounds and levels)
sfx - N/A (can't hear 'em)
design - 7 (menu's are confusing)
gameplay - 8 (in spite of flaws, still pretty cool)
overall, this is a hip game that just lacks a few rivets here and there.