World fourty-seven is with three iceboxes which need special handling.
Step by step solution
Go UP, RIGHT, UP, UP, LEFT and push DOWN. Go RIGHT, UP, UP, RIGHT, RIGHT, RIGHT and push DOWN. Go DOWN, RIGHT, DOWN and push LEFT.
Go RIGHT, DOWN and push LEFT. Go DOWN, LEFT, push UP, go LEFT, LEFT, LEFT and push UP. Go DOWN, RIGHT, RIGHT, RIGHT, RIGHT, UP, UP, UP, UP, LEFT and push DOWN. Go RIGHT, DOWN and push LEFT.
Go LEFT, DOWN, DOWN, LEFT, LEFT, UP and push UP. Go DOWN, DOWN, RIGHT, RIGHT, UP, UP, RIGHT, UP and push LEFT. Go UP, LEFT, LEFT, push DOWN, DOWN, DOWN and DOWN.
Go RIGHT, RIGHT, UP, push RIGHT, go UP, RIGHT and push DOWN.
Congratulations. You have completed world fourty-seven. Get ready for world fourty-eight.