there are two things that would be fun if you added it; a death counter, and maybe a car selection screen, and that you can unlock cars with achievements you could earn while playing! If that would be added i'd be hooked to the game! (not that i'm not hooked already!)
Thanks for the suggestions! Unlockable cars have been suggested before, but this would need a lot of additional work. At some point a dev needs to "move on" to have time for future projects.
I might do smaller updates in the future and added the death counter to the list. :)