I'm loving your demo so far. I suggest having the characters give you hints about your moveset. I had no idea about the somersault until I watched some other people playing parts I got stuck on and wondered how they heck they were able to make some jumps. The triple jump thing kind of hurts my brain sometimes. I'm not sure what to suggest, but having to hit three buttons (Xbox controller - hold x, hit rb, a, a again to glide, then y to do the roll jump) makes me really have to stop and think an awful lot and redo jumps often.
Keep up the awesome work! It's a very pretty game!