The atmosphere of the game is really good, I like the music and visuals.
The gameplay is nice but I feel like the fun lies mostly in speed and collisions. It often feels like you have to roll as slowly as the game allows you to, which is challenging but not always satisfying.
I got stuck on level 3 I believe? Where you have to roll between two holes, I felt like the level was impossible to achieve.
The pickups are rather satisfying, good job, the game deserves the attention it is getting :)