great game! I think this one is quite original, I don't think I have seen a game quite like this in the Jam, smart game design!
Side note: I did notice you can cheese the system a little bit, at least on the earlier levels. you can place a block in the corner and carry a block and jump on the one in the corner, drop the block and it goes right on top of the one in the corner and lets you win the game. Not sure if thats intentional but I was able to disregard the rest of the level.