Perfect
The concept's highly original, yet easy to grasp. The gameplay is solid, simple, and smooth. There's lots of action, pumped up with fitting music and sound. Nothing's lacking about the graphics or layout. Really, what's not to like?
I did have one idea: with every jump, you can jump farther on the next jump in the sequence. So if you get 3 in a row, you can start jumping 2 lanes of traffic, for longer combos, until you jump back in the car and it resets.