Interesting concept and interpretation of the theme. I liked the idea of being able to place things to make the level beatable, I think that's a fairly unique concept with a lot of room for further exploration. The movement overall felt pretty good. The levels are largely fairly well designed although given that some of the platforming gets pretty challenging this game might benefit from some mechanism for the player to return to the start when they fall or something along those lines? Some of the rooms are fairly large compared to how much platforming there actually is so falling can become quite frustrating and cumbersome.
Overall great job!