Love the style of the game and the game plays great, if you plan on continuing this game, I would change the background to feel more 3D, because it feels out of place in the 3D enviroments.
This game is great, would love to see a full-release of it, one thing I would change if you're planning on still working on it, I would change the car physics a bit to feel more realistic and in-control. Still a very great game though.