On world fifty-one, four iceboxes make the puzzle harder than it looks at the beginning.
Step by step solution
Push RIGHT, go RIGHT, DOWN, DOWN, RIGHT, DOWN, DOWN, LEFT, LEFT, LEFT and push LEFT. Go RIGHT, RIGHT, RIGHT, RIGHT, UP, UP, UP, LEFT, UP, UP, RIGHT and push DOWN. Go DOWN, DOWN, DOWN, RIGHT, DOWN and push LEFT.
Go UP, UP, UP, UP, UP, LEFT, LEFT, LEFT, LEFT, LEFT, DOWN and push RIGHT. Go RIGHT, RIGHT, RIGHT, UP, RIGHT and push DOWN. Go DOWN, DOWN, DOWN, RIGHT, DOWN and push LEFT. Go UP, UP, UP, UP, UP, RIGHT and push DOWN. Go LEFT, LEFT, LEFT, LEFT, LEFT, LEFT, DOWN and push RIGHT. Go RIGHT, RIGHT, RIGHT, UP, RIGHT and push DOWN. Go DOWN, DOWN, RIGHT, DOWN and push LEFT. Go UP, UP, UP, UP, RIGHT and push DOWN. Go LEFT, LEFT, LEFT, LEFT, DOWN and push RIGHT. Go RIGHT, UP, RIGHT and push DOWN. Go DOWN, RIGHT, DOWN and push LEFT.
Go RIGHT, UP, push UP, UP and UP.
Congratulations. You have completed world fifty. Get ready for world fifty-two.