Fun idea with a good execution, but with room for improvement.
The acceleration and braking feels just right, so you can control your car with a fair amount of precision. Auto-turning on the green arrows works well most of the time, but sometimes they change just as you enter them (or even when you're already on them) and can get you off guard.
The pedestrians and other cars present a fair challenge for you to avoid hitting them, but sometimes the RNG will place a car right behind you when the level starts, forcing you to accelerate right away. Also, the countdown numbers are too big and can often hide a pedestrian crossing the street (not too mention, they're a bit too much, being on every junction).
Overall, a good entry (Also, ragdoll physics (like in the trailer at 0:43 and 1:48) are always funny =D).