My brain was actually working on this one! Really clever puzzle design and its confusing at the start but once I got it, it immeditately clicked. Though SPOILERS.....
I do think that the last puzzle is a bit confusing? Someone on discord mentioned that one thing is wrong with that one which makes more sense now.
Simple but effective visual style, and satisfying sound effects as well! I would say its quite serious as well! Overall, really great game and I really enjoyed this one, awesome work!