Overall this is a vey polished game jam entry and pretty fun to play. It's obvious that a lot of care went into it. The visuals are neat and cohesive and the controls are smooth (though I did have issues with double jump in one room in particular, see below). Sound effects are fitting. I thought the music with the warping lo-fi filter was a nice touch. I hung around in the level select to hear the full track. Nice. The level music maybe could use a bit more attention though.
Unfortunately, I ran into what seems like a soft lock. The switch here only gave me one shot and didn't reset after the block got destroyed. After a while I decided to try exiting and re-entering the level, and that fixed it. Weirdly, when I returned the switch reset after failed attempts like intended.
I also want to point out this room, which feels quite a bit more difficult and kind of unfair compared to the other challenges. I almost gave up here, as I felt like my double jumps weren't registering quick enough to make this jump:
I did notice some of the other minor things that other players picked up on: blocks not quite setting into place, an odd collision at one point, etc. I also noticed there were a couple places where the camera was not following properly. But really, these were minor nitpicks in an otherwise well-executed game. Honestly, it's a triumph. Well done.