Great visuals and audio. At first I though the speedup from entering the starboxes was a bug but then I noticed a bunch of shortcuts that make use of that as a mechanic so I retried a bunch of times and I had great fun.
This's my PB
I encountered 1 small bug - I jumped when leaving the penultimate room and I got teleported to a previous level.
A quick restart would have been nice (I tried R and ESC) and some colliders could be a tad more forgiving (mainly the jellyfish and the corridor in the "soft-lock" level).