World five hundred and twelve has four rooms for each two boxes.
Step by step solution
Go LEFT, LEFT, LEFT, LEFT, LEFT, LEFT, LEFT, UP, UP, UP, UP, LEFT, LEFT, DOWN, push RIGHT, RIGHT, RIGHT, RIGHT, RIGHT, go UP, RIGHT and push DOWN.
Go LEFT, LEFT, LEFT, LEFT, LEFT, LEFT, DOWN, DOWN and push RIGHT. Go LEFT, DOWN, DOWN, RIGHT and push UP. Go RIGHT, push UP and UP. Push LEFT, go UP, push RIGHT, RIGHT, RIGHT, go DOWN, RIGHT, push UP, go LEFT, UP and push RIGHT.
Go LEFT, DOWN, LEFT, LEFT, DOWN, DOWN, push LEFT, LEFT, LEFT, LEFT, LEFT, go UP, LEFT and push DOWN.
Go RIGHT, RIGHT, RIGHT, RIGHT, RIGHT, UP, UP, LEFT, push DOWN, go RIGHT, DOWN, push LEFT, LEFT, LEFT, go DOWN, LEFT, push UP, go RIGHT, UP and push LEFT.
Go DOWN, RIGHT, RIGHT, RIGHT, DOWN, DOWN, RIGHT, DOWN, DOWN, LEFT, LEFT, LEFT, LEFT, UP, LEFT, LEFT, DOWN, push RIGHT, RIGHT, RIGHT, RIGHT, RIGHT, go DOWN, RIGHT, push UP, UP, UP, go RIGHT, UP, UP, LEFT, push DOWN, DOWN, DOWN, DOWN, go RIGHT, DOWN, push LEFT and LEFT.
Go UP, LEFT, LEFT, LEFT, DOWN, DOWN, LEFT, push UP, go LEFT, UP, push RIGHT, RIGHT, RIGHT, RIGHT, RIGHT, go DOWN, RIGHT, push UP, UP, UP, go LEFT, UP, UP, RIGHT, push DOWN, DOWN, DOWN, DOWN, go LEFT, DOWN and push RIGHT.
Go UP, UP, UP, RIGHT, UP, RIGHT, RIGHT, RIGHT, RIGHT, DOWN, DOWN, DOWN, DOWN, LEFT, LEFT, UP, UP and push RIGHT. Go LEFT, DOWN, DOWN, RIGHT, RIGHT, UP, push UP, UP, go RIGHT, UP, push LEFT, LEFT, LEFT, LEFT, LEFT, go UP, LEFT, LEFT, DOWN, push RIGHT, go UP, RIGHT and push DOWN.
Go RIGHT, RIGHT, RIGHT, RIGHT, DOWN, DOWN, LEFT, LEFT, DOWN, push RIGHT, go DOWN, RIGHT, push UP, UP, UP, go RIGHT, UP, push LEFT, LEFT, LEFT, LEFT, LEFT, LEFT, go UP, LEFT and push DOWN.
Congratulations. You have completed world five hundred and twelve. Get ready for world five hundred and thirteen.