I haven't played a game yet which after playing for a bit then had me go "ohhh". Great idea, and I love how the level design encouraged all sizes - I found myself opting for the small passages at some points, larger ones elsewhere! I may return to best my score as I know there's tonnes to improve on, and that was really fun. The physics is pretty wacky, but that's the charm!
I do wish I didn't have to start at the beginning and could respawn nearby if I fall off the course. As a new player it took quite a while to make progress, and with the nice leaderboard it could cost time rather than having to reset the run.