This is a cool puzzle mechanic! It took me a little while to get the knack of it but once it clicked with me I really enjoyed playing through the very interesting levels. The difficulty curve is really nice and I never felt overwhelmed with the increase in complexity. With a bit more polish and bug fixing this could definitely be a full game! You could expand on it by adding other objects that behave differently to the crate, or you could add other tiles like conveyor belts and one way doors. Really nice submission!