Made a little progress on the game idea I’d been experimenting with. The idea is to do find a series of orthogonal (like a rook in chess!) moves that land on every square exactly once each before returning to the start, dodging walls and jumping pits. But the squares have arrows (limiting the direction you can move out of them) or numbers (specifying the distance you must travel from them). Every board is solvable, starting from any square.