World one hundred and twenty-one is very hard stage, resembling a previous hard puzzle.
Step by step solution
Push LEFT, LEFT, LEFT, go DOWN, DOWN, LEFT, LEFT, push UP and UP. Go DOWN, DOWN, RIGHT, RIGHT, UP, UP and push LEFT. Push UP and UP.
Go RIGHT, UP, RIGHT, RIGHT, RIGHT, UP, UP, UP, LEFT, LEFT, LEFT, DOWN and push DOWN. Go RIGHT, DOWN, DOWN, LEFT, LEFT, DOWN, DOWN, RIGHT, RIGHT, RIGHT, RIGHT, push UP, UP and UP.
Go LEFT, LEFT, UP, LEFT and push DOWN.
Go RIGHT, RIGHT, RIGHT, push UP, UP, go RIGHT, UP, push LEFT, LEFT, LEFT, go UP, LEFT, push DOWN, DOWN and DOWN.
Go LEFT and push DOWN. Push RIGHT and RIGHT.
Go UP, LEFT, UP, UP, RIGHT, RIGHT, RIGHT, DOWN, DOWN, DOWN, DOWN, DOWN, DOWN, LEFT, LEFT, LEFT, LEFT, UP, push LEFT, LEFT and LEFT.
Go DOWN, LEFT, LEFT, UP and push RIGHT.
Go UP, UP, push RIGHT, RIGHT, RIGHT, RIGHT and RIGHT.
Go UP, UP, UP, RIGHT, RIGHT, RIGHT, DOWN, DOWN, DOWN, DOWN, DOWN, DOWN, LEFT, LEFT, LEFT, LEFT, UP and push UP.
Go DOWN, DOWN, RIGHT, RIGHT, RIGHT, RIGHT, UP, UP, UP, UP, UP, UP, LEFT, LEFT, LEFT, DOWN, DOWN, DOWN, push LEFT and LEFT.
Go RIGHT, DOWN, DOWN, LEFT, LEFT and push LEFT.
Go DOWN, LEFT, LEFT, UP, push RIGHT, RIGHT, RIGHT and RIGHT.
Push DOWN, go RIGHT, push UP and UP.
Go DOWN, DOWN, RIGHT, RIGHT, RIGHT, RIGHT, UP, UP, UP, UP, UP, UP, LEFT, LEFT, LEFT, DOWN, DOWN, DOWN and push LEFT.
Go RIGHT, UP, UP, UP, LEFT, LEFT, LEFT, UP, LEFT, LEFT, DOWN, push RIGHT, RIGHT, RIGHT, RIGHT and RIGHT.
Go DOWN, DOWN, DOWN, LEFT, DOWN, DOWN, DOWN, RIGHT, RIGHT, RIGHT, RIGHT, UP, UP, UP, UP, UP, UP, LEFT and push LEFT. Go UP, LEFT, push DOWN, DOWN and DOWN.
Go LEFT, DOWN, DOWN, DOWN, DOWN, RIGHT, DOWN, DOWN, LEFT, LEFT, push UP, UP, go RIGHT, UP, push LEFT, LEFT, LEFT, go DOWN, LEFT, LEFT, UP, push RIGHT, RIGHT, RIGHT, RIGHT, go DOWN, RIGHT, push UP and UP.
Go DOWN, LEFT, LEFT, LEFT, LEFT, UP, UP, RIGHT, UP and push UP.
Go DOWN, DOWN, LEFT, DOWN, DOWN, RIGHT, RIGHT, RIGHT, RIGHT, DOWN, RIGHT, RIGHT, RIGHT, RIGHT, UP, UP, UP, UP, UP, UP, LEFT, LEFT, LEFT, LEFT, LEFT, LEFT, UP, LEFT, LEFT, DOWN, push RIGHT, RIGHT, RIGHT and RIGHT.
Go LEFT, LEFT, LEFT, DOWN, DOWN, LEFT, DOWN, DOWN, DOWN, RIGHT, RIGHT, RIGHT, DOWN, RIGHT, RIGHT, RIGHT, RIGHT, RIGHT, UP, UP, UP, UP, UP, UP, LEFT, LEFT, UP, LEFT, push DOWN and DOWN.
Congratulations. You have completed world one hundred and twenty-one. Get ready for world one hundred and twenty-two.