World twenty-eight is one of the harder small puzzles.
Step by step solution
First go LEFT, UP, UP, push RIGHT, RIGHT, UP and UP.
Go DOWN, DOWN, LEFT, LEFT, DOWN, DOWN, RIGHT and RIGHT. Push UP, UP and UP.
Go DOWN, DOWN, DOWN, RIGHT, RIGHT and UP. Push LEFT, go DOWN, LEFT, LEFT, LEFT, UP, UP, RIGHT, RIGHT, UP and RIGHT. Push DOWN, go LEFT, LEFT, LEFT, DOWN, DOWN, RIGHT and RIGHT. Push UP, UP, go RIGHT, UP, push LEFT, go DOWN and LEFT. Push UP and UP.
Go DOWN, DOWN, RIGHT, DOWN, DOWN and RIGHT. Push UP and UP.
Congratulations. You have completed world twenty-eight. Get ready for world twenty-nine.