Finally got around to finishing the game! It took me 3 attempts spread across 2 days to get it done, this game is massive! To be upfront, I'm not a fan of the idea that losing power in a game could be fun and your game didn't prove me wrong, even though I suppose I wasn't losing on many hidden secrets (I wasn't looking for any) I just felt like I had to hassle through longer corridors because I couldn't destroy crates or something. But that's kinda the beauty of jams, where we try things we wouldn't do otherwise, so I'm not judging based on that.
Generally speaking I enjoyed the game, combat was definitely the shining part of the experience. I like various enemy design, even though most of them were just shooting at various directions and moving left and right. There were a few "annoying" cases of turret skipping charging phase and shot me out of the sky, or rocket literally waiting for me to cross the gap, to snipe me into the void, but other than that it was smooth. Environmental hazards were nice and I like each region had something unique. One interesting idea I came up with during playing was maybe tweaking movement logic of those flying cylinder enemies to prioritise going on Y axis before X, so we don't have to short hop in order to hit them all the time, that as kinda obnoxious.
Visuals were very consistent, character looked nice, sounds were okay after you got that fix we talked about. Unfortunately I still don't hear music :'( I wish you went a bit more with backgrounds, maybe added some crosshatching or other lines to fill platforms to make areas even more distinct with the limited palette that you had. There was one place where I couldn't distinguish ladder from platforms around it, somewhere in a section with lasers, that's mainly why I'm suggesting some sort of fill texture for platforms. Oh also magenta lines for moving platform rails was a bit jarring.
Level design is great, not much to say there, amazing job.
tl;dr Great game, fun combat, well done!