I agree with previous comment, a bit challenging to spark the bubble at the level when you get the charge and right after 2 shurikens come your way. Having a charge whilst moving would create a different kind of gameplay, a more hectic approach to puzzles whilst at the same point creating possibility for a large variety of puzzles. I do love the concept and it does feel like a polished game. The puzzles are challenging and it does give you a sense of progression. Hope you keep working on the game because it does have potential. Good luck. Also, the checkpoint system is a nice touch.