Fantastic title, love it! The puzzles were all super creative and the base mechanic itself makes use of the topic in a very interesting way. It was always fun to play through from the beginning to the end. The touch of the added distortion to the music depending on how many crates are on screen was a really nice touch of audio feedback. Love it!
I always prefer if w or the up arrow is jump in addition to space because it feels more natural to me but since this wasn't very action-focused, it was ok.
There was only one point where I got stuck for a while: the place where there are lots of blue buttons and one red button and the crates move a wall to the right. What was confusing to me is that in the previous puzzle, the red button always deleted the old crate and since that crate was purple, I thought the rule was purple crate = only get one. So I didn't even try to press the red button multiple times here for a couple of minutes.