I really liked the idea but there is couple of problems 

1- the box should fall from a one block gap but instead its climb up and its does't make sense in a puzzle game .
2- many levels are broken and can be finished without using the all the elemints and commands .

i am sorry if i sound harsh ,i am just want to give you some feedback .

This is really imaginative use of the theme and I love the head-scratching puzzles later in.
I was able to cheese a couple screens by accident as the box likes climbing edges, but I had fun!
Great work!