My best score was 12.. couldn't beat you...
But overall fun little game. I like that you need to balance between inner and outer ring while drifting
Just collision detection feels a little bit of the sprite. Maybe if you would change sprite to something else would be better.
And in later game it feels that you don't have time to react when you see a spike (maybe I am just to old for this)
But other than that really nice little game I played it for quite a while :D keep up the good work!