Click a square and type. Click the same square again (or press Space) to switch direction →/↓. Backspace erases, arrows move. Right-click a tile to mark it as a blank (worth 0).
Click a square and type. Click the same square again (or press Space) to switch direction →/↓. Backspace erases, arrows move. Right-click a tile to mark it as a blank (worth 0).