I had a lot of fun overall, but there are definitely a few things I'd change:
With my resolution the speech bubbles often covered up my character
If you land incorrectly once the scooter starts spinning and there's no way to stop it, I'd either introduce angular damping or let the player control the rotation while in mid-air (like in Tony Hawk, Need for Madness, Distance etc.)
Otherwise the abilities were really interesting and I liked how you introduced them one at a time.