I like the ideas and also really liked the visual style, great job there! Managed to barely finish it on first try (won't mention the crash on start because it's already known). My only complaints would be:
- Second puzzle is more awkward to figure out than the first: only thing suggesting what you should do being running out of air. Also didn't help that one ring had a symbol either in common with another ring or just very similar (with the artstyle it's a bit hard to figure out sometimes!)
- Third puzzle I've no clue what I was supposed to do beyond just going through it like a maze. I did notice some symbols also became red like in the second puzzle, but I was already on short time left