World twenty-seven features only four boxes in very tiny puzzle.
Step by step solution
First go LEFT, DOWN, push LEFT, go DOWN, DOWN, DOWN, RIGHT and RIGHT.
Push UP, UP, go DOWN, DOWN, LEFT, LEFT, UP, push RIGHT and UP. Go RIGHT, RIGHT, DOWN and push LEFT.
Go UP, LEFT, LEFT, UP, UP, RIGHT and RIGHT. Push DOWN and DOWN.
Go LEFT, LEFT, LEFT, LEFT, UP and push RIGHT. Go DOWN, RIGHT, RIGHT, RIGHT, UP, UP, LEFT, LEFT and push DOWN.
Go UP, RIGHT, RIGHT, DOWN, DOWN, LEFT and push LEFT. Go DOWN, DOWN, RIGHT, RIGHT and push UP.
Go DOWN, LEFT, LEFT, UP, UP, UP, LEFT, LEFT, DOWN and push RIGHT.
Congratulations. You have completed world twenty-seven. Get ready for world twenty-eight.