Great work! The music is awesome too.
Noticed a few bugs: I got stuck in infinite death loop by boosting over the edge. It looks like it rewinds back just after I boosted so I couldn't abort it.
I also switched to gamepad midway through playing and noticed the "SHIFT" button didn't show gamepad button as I was falling down pit after getting mask. It worked on second playthrough though, after using gamepad entire time.
I would be excited to see an expanded version of the game!