World five hundred and nine has two boxes for placement at the left and right ends of the boxes line.
Step by step solution
Go LEFT, LEFT, UP, UP, push RIGHT and RIGHT. Go LEFT, LEFT, DOWN, DOWN, RIGHT, RIGHT and push UP. Push LEFT, go UP and push UP. Go RIGHT and push DOWN. Go LEFT, DOWN, DOWN, RIGHT, RIGHT, RIGHT, UP, UP, push LEFT and LEFT.
Go UP, UP, UP, LEFT, LEFT, DOWN and push RIGHT. Go DOWN and push DOWN. Go RIGHT, RIGHT, RIGHT, DOWN, DOWN, LEFT, LEFT and push UP.
Push RIGHT, go LEFT and push UP. Go LEFT, UP, UP, UP, RIGHT, RIGHT, DOWN and push LEFT. Push DOWN, DOWN, go RIGHT, DOWN, DOWN, LEFT, LEFT and push UP.
Push RIGHT, go UP, UP, UP, UP, LEFT, LEFT, DOWN, push RIGHT, go UP, RIGHT, push DOWN, DOWN and DOWN.
Go UP, LEFT and push DOWN.
Congratulations. You have completed world five hundred and nine. Get ready for world five hundred and ten.