World ninety have most of the boxes at the top of the puzzle.
Step by step solution
Go LEFT, LEFT, LEFT, LEFT, UP, UP, LEFT, UP, UP, UP and push RIGHT. Go UP, push UP, go RIGHT, UP and push LEFT.
Go RIGHT, RIGHT, RIGHT, RIGHT, RIGHT, DOWN, DOWN, LEFT and push UP.
Push LEFT, LEFT, LEFT and LEFT.
Go RIGHT, RIGHT, RIGHT, RIGHT, RIGHT, UP, push LEFT, LEFT and LEFT. Go RIGHT, RIGHT, DOWN, DOWN, DOWN, LEFT, push UP and UP.
Go DOWN, DOWN, LEFT, push LEFT, go DOWN, LEFT, push UP, UP and UP.
Go DOWN, DOWN, DOWN, LEFT, DOWN, DOWN, RIGHT, RIGHT, push UP and UP. Go LEFT, UP, push RIGHT, RIGHT, RIGHT, go UP, RIGHT, RIGHT, RIGHT, DOWN, DOWN, DOWN, LEFT, LEFT, UP, push UP, UP and UP.
Go DOWN, DOWN, LEFT, LEFT, LEFT, DOWN, DOWN, DOWN, LEFT, DOWN, DOWN, RIGHT, RIGHT, RIGHT, RIGHT, push UP, UP, UP, UP, UP, UP, go LEFT, UP, push RIGHT, go DOWN, RIGHT and push UP.
Go DOWN, RIGHT, DOWN, DOWN, DOWN, DOWN, DOWN and push LEFT. Go RIGHT, UP, UP, LEFT, LEFT, UP, UP, LEFT, LEFT, LEFT, DOWN, DOWN, DOWN, LEFT, DOWN, DOWN, RIGHT, RIGHT, RIGHT, RIGHT, push UP, UP, UP, UP, UP, UP, go LEFT, UP and push RIGHT.
Go DOWN, DOWN, LEFT, LEFT, LEFT, DOWN, DOWN, RIGHT, push RIGHT, RIGHT, RIGHT, go LEFT, UP, UP, UP, RIGHT, RIGHT, DOWN, DOWN and push DOWN.
Congratulations. You have completed world ninety. Get ready for world ninety-one.