You should mention right away that this isn't exactly a standard Sokoban game :) Still, I managed to figure out how to play it. It’s an interesting concept, though it takes a bit more time to really get a feel for the game.
The music sounds a bit harsh; either the high-frequency channel needs to be turned down, or there should be an option to turn off the music while keeping just the sound effects.
As always, I opened the manual only after I’d already learned how to play :)