World one hundred and fourty-four is with only nine boxes, but a hard stage. The three boxes at the center does not need to move.
Step by step solution
Go UP, push LEFT, LEFT and LEFT.
Go RIGHT, DOWN, DOWN, LEFT, LEFT, LEFT, LEFT and push UP. Go DOWN, LEFT, LEFT, LEFT, UP, UP, RIGHT, RIGHT and push RIGHT.
Go DOWN, DOWN, RIGHT, RIGHT, RIGHT, RIGHT, UP, UP, RIGHT, RIGHT, DOWN, DOWN and push LEFT. Push UP, go RIGHT, UP, push LEFT and LEFT.
Go RIGHT, DOWN, DOWN, push LEFT, LEFT, LEFT, LEFT and LEFT. Go UP, UP, LEFT, LEFT, LEFT, DOWN, DOWN, RIGHT, push RIGHT, RIGHT, RIGHT and RIGHT.
Go LEFT, LEFT, UP, UP, LEFT and push DOWN. Go UP, LEFT, LEFT, DOWN, DOWN, RIGHT, push RIGHT, RIGHT and RIGHT.
Go LEFT, LEFT, UP, UP, LEFT, push DOWN, go LEFT, DOWN, push RIGHT, RIGHT and RIGHT.
Congratulations. You have completed world one hundred and fourty-four. Get ready for world one hundred and fourty-five.