Really polished sokoban, i really like it.
Though on the last level, if you press buttons in clockwise order (so left -> top-left -> top) and make the 1st dude just push the crown to the right for, like, 10 turns, then when pressing the top button on the 4th dude, the 1st dude just won't appear.
It doesn't happen if you press the buttons in counter-clockwise order though, 1st dude appears and pushes the crown to the exit if you go for the left button last.