It's a fun game but my opinion is that you've made a mistake by building something that involves a car and not having a reverse function and I'll explain why.
I got so annoyed when I kept planting into an object and just having to sit there waiting for time to run out. This turned it from a driving game into a ring location/map memory game so you don't overshoot your mark or hit random objects in the path like lamp posts, a few rings were so close to the turning for the next one that you had very little time to maneuver and line up for tight gaps and if you fudged it then you were stuck staring at your mistake for x seconds.
On the other hand I understand why you DIDN'T include a reverse, the car functions like those toy cars that you used to wind up and let them fly. One idea off the top of my head is that you could have made the key both charge the car and control its direction by having reverse as counter clockwise, I think that's the implementation I would have gone for personally and would have also followed the 'rewind' theme.
Despite that, the graphics and music you have used compliment the game well, the programming itself seems to be pretty solid and its a great first jam submission so good job.