That was a pretty neat little game! Didn't feel like a game made by someone with only 2 weeks of experience. The atmosphere was calming, even when it got faster. I liked the way the music sped up with the car's speed. The relational gravity was well made, too, as well as the camera that followed the player pretty smoothly.
The biggest hiccup I could see was that it was hard to see if there was a hole in front of me. It probably would have helped if the camera was higher and tilted more towards the ground.
By the way, you're doing the right thing moving from one quick project to the next, that's the best way to learn, particularly in the beginning. Good luck!