World two hundred and three is with four ice boxes for placement in two rooms.
Step by step solution
Go DOWN, RIGHT and push UP. Go UP, UP, UP, RIGHT, UP and push LEFT. Go DOWN, DOWN, DOWN, DOWN, DOWN, LEFT, LEFT, LEFT, UP and push RIGHT. Go RIGHT, DOWN, RIGHT and push UP. Go UP, UP, UP, RIGHT, UP and push LEFT.
Go DOWN, DOWN, DOWN, DOWN, DOWN, RIGHT and push UP. Go RIGHT, UP and push LEFT. Go DOWN, LEFT and push UP. Go UP, UP, RIGHT, UP and push LEFT.
Go DOWN, DOWN, DOWN, DOWN, LEFT, LEFT, UP and push RIGHT.
Congratulations. You have completed world two hundred and three. Get ready for world two hundred and four.