Ok but been done to death
As said in another review, this has been done way too many times, and with nothing extra special about it's not very original. But considering these games are fun, I think you'll get away with it from some people ;). Slightly including me :P.
Now, the graphics are nice, I'm not too fond of the pictures of cars but still, it's alright. The engine is ok but could be improved. Sometimes it looks as if you're half inside a car and the chimneys went a little bit bad. At least it's better than being precise and impossible, but it could do with some tweaking. The gameplay(as said) isn't very original but still fun. Replay value - not much really unless you really enjoy the levels, plus only 1 bike unlockable(excuse me if there's more) so more would be nice. Overall though a pretty fun game. A little underated if you look at scores of games almost identical to this.
7/10
4/5 (I'm feeling generous ;))