I think the randomization could have used some work. I had to forcefully crash the car because none of the tress spawned in the middle of the road, and once you get fast enough you can basically stop playing and just let the car sit in the middle and drive itself. The rocks are common enough so that you will keep hitting them as the car sits there.
Really cool idea, and the low poly models look good!
my highscore was over 14,000