On world one hundred and fifty-one the boxes have to be put in one of the corners of the puzzle.
Step by step solution
Push UP, go LEFT, LEFT, LEFT, DOWN, LEFT, LEFT, LEFT, LEFT, LEFT, LEFT, LEFT, LEFT, LEFT, LEFT, UP, UP, UP, UP, UP, UP, RIGHT, RIGHT, UP, UP, LEFT and push DOWN. Go RIGHT, DOWN, push LEFT, go UP, LEFT, push DOWN, DOWN, DOWN, DOWN, DOWN and DOWN.
Go UP, UP, UP, UP, UP, RIGHT, RIGHT, DOWN, RIGHT, push DOWN and DOWN. Go RIGHT, DOWN, push LEFT, LEFT, LEFT, go RIGHT, RIGHT, UP, UP, LEFT, UP, UP, LEFT, LEFT, DOWN, DOWN, DOWN and push DOWN.
Go UP, UP, UP, UP, RIGHT, RIGHT, UP, UP, RIGHT, RIGHT, RIGHT, DOWN, push LEFT, LEFT and LEFT. Go UP, LEFT, push DOWN, go RIGHT, DOWN and push LEFT. Go UP, LEFT, push DOWN, DOWN and DOWN.
Go UP, UP, RIGHT, RIGHT, UP, RIGHT, RIGHT, RIGHT, RIGHT, DOWN, DOWN, LEFT and push UP. Go RIGHT, UP, push LEFT, LEFT, LEFT, LEFT, go UP, LEFT, push DOWN, go RIGHT, DOWN and push LEFT. Go UP, LEFT, push DOWN and DOWN.
Go UP, RIGHT, RIGHT, DOWN, RIGHT, DOWN, DOWN, DOWN, LEFT, DOWN, DOWN, RIGHT, RIGHT, RIGHT, RIGHT, RIGHT, RIGHT, UP, UP, LEFT, UP, LEFT, push LEFT and LEFT. Go RIGHT, UP, UP, UP, LEFT, UP, LEFT, LEFT, DOWN, DOWN, DOWN, RIGHT, push DOWN, go RIGHT, DOWN, push LEFT, LEFT and LEFT.
Go RIGHT, RIGHT, RIGHT, UP, RIGHT, UP, UP, UP, RIGHT, RIGHT, RIGHT, RIGHT and push DOWN. Go UP, LEFT, LEFT, LEFT, LEFT, DOWN, DOWN, DOWN, RIGHT, RIGHT, UP, RIGHT, push RIGHT and RIGHT. Go LEFT, LEFT, LEFT and push UP. Go DOWN, RIGHT, RIGHT, UP, UP, LEFT, push LEFT and LEFT. Go DOWN, LEFT, push UP, go RIGHT, UP, push LEFT, LEFT, LEFT, LEFT, go UP, LEFT, push DOWN, go RIGHT, DOWN, push LEFT, go UP, LEFT and push DOWN.
Go RIGHT, RIGHT, UP, RIGHT, RIGHT, RIGHT, RIGHT, RIGHT, UP, RIGHT, RIGHT, RIGHT, RIGHT, DOWN, DOWN, DOWN and push DOWN. Go LEFT, DOWN, DOWN, DOWN, RIGHT, RIGHT, UP, UP, push LEFT, go UP, LEFT, push DOWN, DOWN, DOWN, go RIGHT, DOWN, push LEFT, LEFT, LEFT, LEFT, LEFT, LEFT, LEFT, LEFT and LEFT.
Go RIGHT, RIGHT, RIGHT, RIGHT, RIGHT, RIGHT, RIGHT, RIGHT, UP, UP, UP, RIGHT, UP, UP, UP, RIGHT, RIGHT, DOWN, DOWN, RIGHT, DOWN, DOWN and push LEFT. Go DOWN, LEFT, LEFT, LEFT, UP, UP, RIGHT, RIGHT and push DOWN. Go RIGHT, DOWN, push LEFT, LEFT, go RIGHT, UP, UP, LEFT, LEFT, DOWN, push DOWN, go RIGHT, DOWN, push LEFT, LEFT, LEFT, LEFT, LEFT, LEFT, LEFT and LEFT.
Go RIGHT, RIGHT, RIGHT, RIGHT, RIGHT, RIGHT, RIGHT, RIGHT, UP, RIGHT, RIGHT, UP, RIGHT, RIGHT, DOWN, DOWN, RIGHT and push UP. Go RIGHT, UP, push LEFT, LEFT, LEFT, LEFT, go DOWN, LEFT, LEFT, LEFT, UP, UP, RIGHT, RIGHT and push DOWN. Go RIGHT, DOWN, push LEFT, LEFT, go RIGHT, UP, UP, LEFT, LEFT, DOWN and push DOWN. Go RIGHT, DOWN, push LEFT, LEFT, LEFT, LEFT, LEFT, LEFT and LEFT.
Go RIGHT, RIGHT, RIGHT, RIGHT, RIGHT, RIGHT, UP, UP, UP, UP, RIGHT, UP, UP, RIGHT, RIGHT, RIGHT, RIGHT, UP, push LEFT, LEFT and LEFT. Go UP, LEFT, push DOWN, DOWN, DOWN, DOWN, go LEFT, DOWN, DOWN, DOWN, RIGHT, RIGHT, UP, UP and push LEFT. Go UP, LEFT, push DOWN, DOWN, DOWN, go RIGHT, DOWN, push LEFT, LEFT, LEFT, LEFT, LEFT and LEFT.
Go RIGHT, RIGHT, RIGHT, RIGHT, RIGHT, RIGHT, UP, RIGHT, RIGHT, UP, RIGHT, RIGHT, RIGHT, RIGHT, UP, UP, UP, UP, push LEFT, LEFT, LEFT, LEFT and LEFT. Go UP, LEFT, push DOWN, DOWN, DOWN, go LEFT, DOWN, DOWN, DOWN, RIGHT, RIGHT, UP, UP and push LEFT. Go UP, LEFT, push DOWN, DOWN, DOWN, go RIGHT, DOWN, push LEFT, LEFT, LEFT, LEFT and LEFT.
Congratulations. You have completed world one hundred and fifty-one. Get ready for world one hundred and fifty-two.