I really like the graphics style and nice details that are throughout this. The use of different size cars with different mechanics is cool. I personally didn't really like the driving mechanics as much, it took a lot of getting used to and I found it frustrating coming to a halt and getting stuck when hitting things, which happens all too easily with the controls. Maybe it's just skill issue on my part. I liked having the playground area to practice in. I do think this game has plenty of potential to be great with the right gameplay mechanics, if you could nail the driving feel a bit closer to something like mario kart.
By the way I also liked the inclusion of the leaderboard, which is something I wish I could have done for my game.