Wow, nice game!
I really enjoyed the puzzle challenge, although the learning curve felt too steep for me. The mechanic is very simple to understand and quite hard to master, which is exactly what I would want from a good puzzle game. It also helps that the visual presentation is very clear and crisp, the sounds are juicy, and the restart is very fast and not in the least annoying. Also, kudos for creating a whole alternative mode of controls. This is very impressive!
My main issue with the game is that rolling direction is somewhat unintuitive, so I died so many times just because I was accidentally pressing the wrong button. Maybe this can be solved with an on-demand hint that will remind the player which button corresponds to which direction.
Overall, great work, thank you for the game!