Extremely polished and creative! Well on theme too.
Good difficulty level. I managed to finish the game without needing any hints, although it took me quite a while and lots of thinking. I really liked the variety of puzzles you added. Makes or breaks a game like this.
Art style is simple yet effective. I like that the music volume/track changes depending on where you are looking.
For improvements, mainly just the bug fixing that you've already listed in the comments below.
Awesome submission. Congrats!