Nagareru

Game Rules: Nagareru

Follow the arrows around one loop. Dark walls cast wind down a row or column: never travel against it, and turn with it when entering from the side.

Draw one directed loop without branches, crossings or repeated cells. It must pass straight through every arrow on a light cell in its direction. Dark cells are walls. An arrow on a wall blows wind to the next wall or the edge of the board. Never travel against wind. When entering wind from the side, turn with it for at least one cell. Other white cells are optional. Drag between centres to draw, tap an edge to toggle a line, or hold an edge to toggle a cross. Counts follow the chosen size and clues; difficulty changes deductions, not rules.