About · logic game
Cross the pond stepping on every tile exactly once. Stones block, polished ice slides.
You are a disc on a frozen pond. Move one tile at a time; every tile breaks as you leave it, and the crossing ends on the checkered tile.
Because the ice breaks behind you, the route cannot be redrawn, so the game is in planning the whole crossing before the first step. Restart as often as you like, and there is no clock.