Clever game. For me it had that 'Baba Is You' moment when you realize the world can play by different rules.
For feedback, I would have liked WASD controls to move the character. Using arrow keys and space are normally fine...however, in this case, player is also using the mouse. So right hand on mouse and left hand on arrow keys and needing to move hand to the left to spacebar to jump...or left have at spacebar, right hand on arrow keys, then moving hand over to mouse objects...both felt awkward.
Nice game though for the short creation time you noted.