This game is so good! I beat it (and thought I left a comment yesterday but don't see it so I'll leave another one) and enjoyed it quite a lot! I thought level 19 was very hard I almost got stuck, but I persevered because it was so enjoyable. Awesome stuff.
The intro levels were almost like, too easy? Like I don't actually think I quite got what was going on until level 4ish but that didn't stop me from figuring it out when I needed to and having a really great time!
Music is a good addition and I didn't experience too much jank. Occasionally the camera struggles to follow when I go around a corner and I'm in the bottom left of the screen like the wall totally blocks everything for a bit but then if I move it sorts itself out so not a big deal.
It's a bit slow waiting for the slow doors but I can see why you added that for puzzles sake so I don't mind it at all. Good choice adding that new object type, that definitely helped me keep things sorted.
Great work this is a really fantastic game!