Yeah mapping keybinds is hard haha. With three of the fingers already being used to move it's difficult to figure out a good way map 3 additional buttons. But seeing as the game doesn't really require quick decisions, I hope they weren't too bad!
Regarding the music, I agree it doesn't really fit the premise. Kinda wanted a less energic tune since these are puzzles and puzzles require at least a little bit of thinking, so a less energetic song seemed to fit. We could definitely try to find a better balance between the two though. We appreciate your feedback!