World one hundred and thirty-seven is small puzzle with unusual and very hard solution.
Step by step solution
Go UP, LEFT, UP and push LEFT. Go UP, LEFT, LEFT, DOWN, LEFT, DOWN, DOWN, RIGHT and push RIGHT. Go LEFT, LEFT, LEFT, LEFT, LEFT, DOWN, DOWN, RIGHT, RIGHT, RIGHT, RIGHT, DOWN, RIGHT, RIGHT, UP and push LEFT. Push UP and UP. Go LEFT, LEFT, LEFT, LEFT, LEFT, DOWN, DOWN, RIGHT, RIGHT, RIGHT, push RIGHT, go DOWN, RIGHT, RIGHT, UP and push LEFT. Go UP, UP, LEFT, LEFT, UP, UP, RIGHT, UP, RIGHT, RIGHT, DOWN, RIGHT, DOWN, RIGHT, DOWN, DOWN, DOWN, push LEFT and LEFT.
Go DOWN, LEFT, push UP, go RIGHT, RIGHT, RIGHT, UP, UP, UP, LEFT, UP, LEFT, UP, LEFT, LEFT, DOWN, LEFT, DOWN, DOWN, LEFT, LEFT, LEFT, DOWN, DOWN, RIGHT, RIGHT, RIGHT and push RIGHT. Go LEFT, LEFT, LEFT, LEFT, UP, UP, RIGHT, RIGHT, RIGHT, UP, UP, RIGHT, UP, RIGHT, RIGHT, DOWN and push LEFT. Go RIGHT, RIGHT, DOWN, RIGHT, RIGHT, UP, push LEFT and LEFT. Go RIGHT, DOWN, DOWN, DOWN, DOWN, LEFT, LEFT, DOWN, LEFT, LEFT, UP, LEFT, LEFT, LEFT, LEFT, UP, UP, RIGHT, RIGHT, RIGHT, RIGHT, RIGHT and push UP.
Go DOWN, LEFT, LEFT, LEFT, LEFT, LEFT, DOWN, DOWN, RIGHT, RIGHT and push UP. Go DOWN, LEFT, LEFT, UP, UP, RIGHT, push RIGHT and RIGHT. Go LEFT, DOWN, DOWN, RIGHT, RIGHT, DOWN, RIGHT, RIGHT, UP and push LEFT.
Push UP and UP. Go DOWN, DOWN, push LEFT, LEFT, LEFT, go UP, UP, LEFT, LEFT, DOWN, DOWN, push RIGHT, RIGHT, RIGHT, RIGHT, go DOWN, RIGHT, push UP and UP.
Congratulations. You have completed world one hundred and thirty-seven. Get ready for world one hundred and thirty-eight.