Stephen's Sausage Roll.
I play a lot of puzzle games. Some of them are pretty hard (the later levels of Tametsi take quite a while to crack).
But this one is on a completely different level. If there is a more brutally punishing sokoban-family game on existence, I have no idea what it might be.
Stephen, if he exists, is most likely condemned to roll sausages eternally in hell, for the sin of making this game.