Really addicting! I managed to get a lap and a half before calling it quits.
The models and colour scheme are simple but really effective. I could see this being a popular mobile game if completing a lap took you to a new level with different obstacles.
I understand this is a single-input jam but it would have been nice to accept the 'd' key as the input too :D
Gravity or the mass of the car is probably a bit too low, but otherwise it's really hard to critique this. Great job!