World fourty-two is only with seven boxes and much easier than fourty-one.
Step by step solution
Go UP, UP, RIGHT, push DOWN, go RIGHT, push RIGHT, go DOWN, push RIGHT and RIGHT. Go UP, push UP, go RIGHT, UP, push LEFT and LEFT.
Go RIGHT, DOWN, DOWN, DOWN, LEFT, LEFT and UP. Push RIGHT, go DOWN, RIGHT, push UP, UP, go RIGHT, UP and push LEFT.
Go DOWN, DOWN, LEFT, LEFT, LEFT, LEFT, LEFT, DOWN, DOWN and RIGHT. Push UP, go LEFT, UP, push RIGHT, RIGHT, RIGHT and RIGHT. Go DOWN, RIGHT, push UP, UP, UP, go RIGHT, UP and push LEFT. Go DOWN, DOWN, DOWN, LEFT, LEFT, LEFT, LEFT, DOWN, DOWN and RIGHT. Push UP, go LEFT, UP, push RIGHT, RIGHT and RIGHT. Go DOWN, RIGHT, push UP, UP and UP.
Go DOWN, DOWN, DOWN and push RIGHT. Push UP, UP and UP. Go DOWN, DOWN, DOWN, DOWN, RIGHT, RIGHT, UP and UP. Push LEFT, LEFT, go DOWN, LEFT, push UP and UP.
Go DOWN, RIGHT, RIGHT, RIGHT, DOWN, push LEFT, go DOWN, LEFT, push UP, UP and UP.
Congratulations. You have completed world fourty-two. Get ready for world fourty-three.
For this world, the solution for Shove It! - Room 18 works as well.