Fun little game, can tell you put some effort into the atmosphere, it's very well done.
Obviously not a lot of audio going on but I really liked what you did with the pitch shifting, didn't feel quite as panicky as the classic sonic drowning, but gave me similar vibes and feedback about the timer.
Thought it was a bit odd not rotating around a central pivot, but you get used to it pretty quickly and the movement feels satisfying once you get an idea of the level design and can plan ahead instead of blasting into every wall lol.
Great job, solid submission!