All around a solid game. I enjoyed how the level was effected by player deaths, that opened the door for a lot of puzzles. The game was well executed and the background was a nice touch.
If you wanted to improve, I suggest having the player follow the moving boxes shot by the purple boxes instead of forcing the player to inch along with it. I was able to do this in level 7 and 8 of my game if you need an example.
Overall, amazing game! One of my favorites from the jam!