World two hundred and seven is with several important passages for the boxes.
Step by step solution
Go LEFT, UP, LEFT, LEFT, LEFT, LEFT, DOWN, LEFT, DOWN, LEFT, DOWN, LEFT, DOWN, LEFT, DOWN, DOWN, RIGHT, RIGHT, RIGHT, RIGHT, push DOWN and DOWN. Go RIGHT, RIGHT, DOWN, DOWN, RIGHT, RIGHT, UP, UP and push LEFT. Go RIGHT, DOWN, DOWN, LEFT, push UP, UP, UP, UP, go RIGHT, UP, push LEFT, go UP, LEFT and push DOWN.
Go RIGHT, RIGHT, DOWN, RIGHT, RIGHT, DOWN, DOWN, push LEFT, LEFT, go DOWN, LEFT, push UP, UP, UP, go RIGHT, UP and push LEFT.
Go DOWN, DOWN, DOWN, RIGHT, RIGHT, RIGHT, RIGHT, DOWN, DOWN, LEFT and push UP. Go RIGHT, UP, push LEFT, LEFT, LEFT, go DOWN, LEFT, push UP, UP, UP, UP, go RIGHT, UP, UP, LEFT, LEFT, DOWN, push RIGHT, RIGHT, go DOWN, RIGHT and push UP.
Go DOWN, DOWN, RIGHT, DOWN, DOWN, LEFT, LEFT, DOWN, LEFT, DOWN, LEFT, DOWN, DOWN, RIGHT, RIGHT, RIGHT, RIGHT, push UP, UP, UP, go RIGHT, UP, push LEFT, LEFT, LEFT, go DOWN, LEFT, push UP, UP, UP, UP, go RIGHT, UP, UP, LEFT, LEFT, DOWN, push RIGHT, go UP, RIGHT, push DOWN and DOWN.
Go UP, UP, UP, UP, UP, LEFT, LEFT, LEFT, LEFT, DOWN, LEFT, DOWN, LEFT, DOWN, LEFT, DOWN, LEFT, DOWN, DOWN, RIGHT, RIGHT, RIGHT, RIGHT, DOWN, DOWN, RIGHT, push RIGHT, go DOWN, RIGHT, push UP, UP, UP, UP, go RIGHT, UP, UP, LEFT, LEFT, DOWN, push RIGHT, go UP, RIGHT, push DOWN, go LEFT, DOWN and push RIGHT.
Go LEFT, DOWN, DOWN, DOWN, DOWN, DOWN, LEFT, LEFT and push LEFT. Push UP, go LEFT and push UP. Push RIGHT, RIGHT, RIGHT, go DOWN, RIGHT, push UP, UP, UP, UP, go RIGHT, UP, UP, LEFT, LEFT, DOWN, push RIGHT, go DOWN, RIGHT, push UP and UP. Go DOWN, DOWN, LEFT, DOWN, DOWN, DOWN, LEFT, LEFT, LEFT, DOWN, DOWN, DOWN, LEFT and push UP. Go DOWN, LEFT, LEFT and push UP. Push RIGHT, RIGHT, RIGHT, RIGHT, go LEFT, UP, UP, LEFT, LEFT, LEFT and push DOWN. Go UP, RIGHT, RIGHT, RIGHT, DOWN, DOWN, DOWN, LEFT, LEFT, LEFT, LEFT, UP, push RIGHT, RIGHT and RIGHT. Push UP, go DOWN, LEFT, LEFT, UP, UP, RIGHT, push RIGHT, RIGHT, RIGHT, RIGHT, go DOWN, RIGHT, push UP, UP, UP, UP, UP, go RIGHT, UP and push LEFT.
Go DOWN, DOWN, DOWN, DOWN, DOWN, RIGHT, RIGHT, RIGHT, UP, UP, RIGHT, RIGHT and push UP. Go RIGHT, UP, push LEFT, LEFT, LEFT, LEFT, go RIGHT, RIGHT and push DOWN. Go RIGHT, DOWN, push LEFT and LEFT.
Go DOWN, DOWN, LEFT, LEFT, LEFT, UP, UP, UP, UP, UP, RIGHT and push DOWN.
Go LEFT, DOWN, DOWN, DOWN, DOWN, LEFT, LEFT, LEFT, LEFT, DOWN, DOWN, DOWN, RIGHT, push UP, UP, go LEFT, UP, push RIGHT, RIGHT, RIGHT, go DOWN, RIGHT, push UP, UP, UP, UP and UP.
Go DOWN, DOWN, DOWN, DOWN, LEFT, LEFT, LEFT, UP, UP, LEFT, LEFT, LEFT, LEFT, UP, UP, RIGHT, UP, RIGHT and push RIGHT. Go DOWN, push RIGHT, RIGHT, RIGHT, RIGHT and RIGHT.
Go LEFT, LEFT, LEFT, LEFT, LEFT, UP, UP, UP, RIGHT, UP, RIGHT, RIGHT, DOWN and push LEFT. Go DOWN and push LEFT. Push DOWN, go LEFT, DOWN, push RIGHT, RIGHT, RIGHT and RIGHT.
Go LEFT, LEFT, LEFT, UP, UP, RIGHT, UP, RIGHT, UP, RIGHT, RIGHT, DOWN and push DOWN.
Go UP, UP, LEFT, LEFT, LEFT, LEFT, push DOWN, DOWN, DOWN, go LEFT, DOWN, push RIGHT, RIGHT and RIGHT.
Go LEFT, LEFT, UP, UP, UP, LEFT, push DOWN, go LEFT, DOWN, push RIGHT, go UP, RIGHT, push DOWN, go LEFT, DOWN, push RIGHT and RIGHT.
Go LEFT, LEFT, UP, LEFT, LEFT, DOWN, LEFT, DOWN, DOWN, RIGHT, RIGHT, RIGHT, push DOWN, go RIGHT, DOWN, DOWN, DOWN, LEFT, LEFT, LEFT, UP, UP, RIGHT, push RIGHT, RIGHT, RIGHT, RIGHT, go DOWN, RIGHT, push UP, UP and UP.
Go DOWN, DOWN, RIGHT, RIGHT, RIGHT, DOWN, DOWN, DOWN, DOWN, LEFT, LEFT, LEFT, LEFT, UP, push UP and UP. Go DOWN, LEFT, LEFT, UP, UP, RIGHT, push RIGHT, go DOWN, RIGHT, push UP and UP.
Congratulations. You have completed world two hundred and seven. Get ready for world two hundred and eight.