Nothing special
It's been done so many times before, and I dont paticularly enjoy these types of games. However, it is obvious you have put alot of effort into this game, but there are a few things you could improve on.
1. Make the tracks a bit more interesting, add some spice to the mix.
2. The controls seem a bit.. slow. Please make them sharper.
3. Special upgrades or something. Something that adds longevity and makes it different to games of this sort. Find an interesting addition, upgrades that you acculumate over time is a good one, but use whatever you want.
If you make a new one, please follow my points.
-MuffinMonsteR