World three hundred and ninety-four is with two separate rooms for the ten boxes.
Step by step solution
Go LEFT, UP, UP, UP, LEFT, LEFT, LEFT and push DOWN. Go LEFT, DOWN, DOWN, RIGHT, DOWN, push RIGHT and RIGHT. Go UP, RIGHT, RIGHT, RIGHT, UP and push RIGHT. Go LEFT, UP, UP, RIGHT, RIGHT, RIGHT, DOWN, DOWN, DOWN, DOWN, push LEFT and LEFT. Go RIGHT, RIGHT, UP, UP, push LEFT and LEFT.
Go RIGHT, RIGHT, DOWN, DOWN, LEFT, LEFT and push UP. Go LEFT, push UP and UP. Go DOWN, DOWN, RIGHT, DOWN, RIGHT, RIGHT, UP, UP, LEFT and push LEFT. Go RIGHT, RIGHT, UP, UP, LEFT, LEFT and push DOWN. Go LEFT and push DOWN. Go UP, RIGHT, UP, RIGHT, RIGHT, DOWN, DOWN, LEFT and push LEFT.
Go RIGHT, RIGHT, UP, push LEFT and LEFT. Go DOWN, DOWN, push LEFT, LEFT and LEFT. Go UP, UP, UP, LEFT, LEFT, LEFT, DOWN, LEFT, DOWN, DOWN, RIGHT and push UP. Push RIGHT. Push UP. Push RIGHT, go UP, RIGHT, push DOWN and DOWN. Go UP, LEFT, LEFT, DOWN and push RIGHT.
Go LEFT, LEFT, DOWN, DOWN, RIGHT, RIGHT and push UP. Push RIGHT and RIGHT. Go LEFT, LEFT, DOWN, LEFT, LEFT, UP, UP, RIGHT, UP, RIGHT, RIGHT and push DOWN. Go UP, LEFT, LEFT, DOWN and push RIGHT. Go LEFT, LEFT, LEFT, UP, push RIGHT, go UP, push RIGHT and RIGHT. Go LEFT, LEFT, DOWN, push RIGHT and RIGHT.
Congratulations. You have completed world three hundred and ninety-four. Get ready for world three hundred and ninety-five.