This game is great, good example of a game that is easy to learn and hard to master.
The graphics, style and music really reminds me of older bmx/skating games, love it!
I do feel like the game punishes you in the wrong way though.
Since the bike grip is so slippery you want to drift all the time to stay on the path and not fall off, but that the same time the path is very narrow and have parts sticking out causing you to bump into them over and over. It makes you wanna hug the wall the entire time, or go super duper slow.
I would either make each path much wider so the drifting feels nice and smooth, or give the bike a lot more grip to maneuver.
Other than that, the game is great! Great job!