World three hundred and ninety-one have an R-form and only one box misplaced.
Step by step solution
Go DOWN, DOWN and push LEFT. Go RIGHT, UP, UP, LEFT and push DOWN. Go UP, RIGHT, UP, UP, LEFT and push DOWN. Go LEFT and push LEFT. Go RIGHT, RIGHT, RIGHT, DOWN, DOWN, LEFT, LEFT and push LEFT. Push UP, go LEFT, LEFT, DOWN, DOWN, RIGHT and push UP. Go RIGHT, RIGHT, RIGHT, RIGHT, UP, UP, LEFT, LEFT and push DOWN.
Go UP, RIGHT, RIGHT, DOWN, DOWN, LEFT and push UP. Go LEFT, LEFT, DOWN, LEFT, LEFT, UP and push RIGHT. Go LEFT, UP, UP, RIGHT and push DOWN. Push RIGHT, go LEFT, UP, UP, RIGHT and push DOWN. Push RIGHT, go LEFT, LEFT, DOWN, LEFT, DOWN, DOWN, RIGHT, RIGHT and push RIGHT. Go LEFT, LEFT and push UP. Go DOWN, RIGHT, RIGHT, UP and push LEFT.
Push UP, go DOWN, DOWN, LEFT, DOWN, DOWN, RIGHT, push UP and UP. Go RIGHT, UP, RIGHT, RIGHT, DOWN, push LEFT, LEFT and LEFT. Go RIGHT, RIGHT, RIGHT, DOWN, DOWN, LEFT and push UP. Go RIGHT, UP, UP, LEFT, LEFT, DOWN, LEFT, DOWN and push RIGHT. Go UP, UP and push UP. Go LEFT and push DOWN. Go RIGHT, RIGHT, RIGHT, UP and push LEFT.
Go RIGHT, UP, UP, LEFT and push DOWN. Go RIGHT, DOWN, DOWN, LEFT, LEFT, DOWN, DOWN, LEFT, LEFT, LEFT, UP, UP, UP, UP, RIGHT, UP, RIGHT and push DOWN. Push RIGHT. Push DOWN, go UP, LEFT, LEFT, LEFT, DOWN, DOWN and push RIGHT. Push UP, go LEFT, UP and push RIGHT, Go DOWN, DOWN, push DOWN, go LEFT, DOWN and push RIGHT.
Congratulations. You have completed world three hundred and ninety-one. Get ready for world three hundred and ninety-two.