OMG you replied after all this time! Thank you!
I just want to rephrase what I said about the masks in puzzles: the mask powers are an incredible vehicle for emergent gameplay and player expression. Just because someone thought of a different way to solve the puzzle than what was intended does not mean it is an invalid solution, nor should you discourage it. Being able to experiment with what is possible with each mask and elemental power is part of the fun.