A very cute and nice puzzle game! Simple mechanic but can create a very complicated and challenging puzzle, definitely loved it! However I think there have some aspects that can be improved, for example, I stuck at level 2 for a long while because I don't realize that the pillar can be swapped. The keyboard key location also kinda awkward to control as "K","L" is not the usual key used in games and it have a long distance from the "R" and WASD key, maybe Q and F will be more comfortable.
Also, I got this bug when I swap and standing on the stuff that I swapped. 