It's interesting, has personality, and look great., the debt and that you can accidentally thow the box out it a clever aproach.
But the tractor beam is too unrealiable making it overly frustrating, on top that you don't know if a box is lock in the beam unless you rotate the wheel of the mouse, it would add a glow or outline effect on the object afected by the tractor beam(it's there is one, exagerate it more its too subtle).
Besides i would fully control the beal with the mouse and istead use the keyboard to acciontate interactrive mechanims like trapdoors or spring , something that help to move more box faster