I’ve been iterating (mostly in my head) through different flavors of Sokoban variants: it started out very math puzzley, then became more pac-man-ish, and is currently taking the form of more of a dungeon crawler (think Mamonosweeper with sokoban instead of minesweeper). If you can’t tell from the image below, the hero (yellow circle) is about to push the sword (cyan box) into a monster (red box). Yeah, I think it’s time to start adding graphics :).