Masking out sound to help little guys go to sleep is a fun idea! The puzzles were tricky but I could eventually solve them. One thing I would say could be improved is just the polish. The X on top of the guys was above the transition, and the transitions felt like they took too long. The distance the boxes had to be from the sound to not turn black also felt different at times. I did like the variety with you having to make sure the sound got to the towers, instead of just blocking it from the people. Great job! :D