What a genius twist on the theme! Sometimes the car understeered a lot and I couldnt turn at all but besides that I didnt really encounter any bugs! What I would say though is that the different levels need something to mechanical to differentiate them so they are not only more interesting and varied but also more memorable.
But still great idea, great execution and Id love to see you expand (get it?) on that idea
Edit: Maybe an idea would be to make things like trees breakable at a certain size, so you can still have a shot at going to the speedlimit