World one hundred and sixty-nine looks like a very hard puzzle. But it is easy, and only one box is not placed.
Step by step solution
Push DOWN, go RIGHT, RIGHT, DOWN and push DOWN. Go LEFT, DOWN, DOWN, LEFT, DOWN and push RIGHT. Go DOWN, RIGHT, RIGHT, UP, UP and push UP.
Push LEFT, LEFT, go DOWN, LEFT, LEFT, UP, UP and push RIGHT. Push UP, go DOWN and push RIGHT. Go DOWN, RIGHT, RIGHT, DOWN, DOWN and push LEFT.
Go RIGHT, UP, UP, LEFT, LEFT, UP, LEFT, UP, push RIGHT, go UP, RIGHT, RIGHT, DOWN and push LEFT. Go RIGHT and push DOWN.
Congratulations. You have completed world one hundred and sixty-nine. Get ready for world one hundred and seventy.