Win by connecting every tile to the power source in the center.
        
          Tap a tile to turn it clockwise.
          Tap and hold a tile to lock it. Hold again to unlock.
          
            Locking is optional. It keeps a stray tap from turning the tiles you're sure about.
          
          The power source turns too.
        
        
          
            
            Start
          
          
            
            Solved
          
        
        Every solution earns a checkmark. Solve in the fewest possible moves for a gold star.
        A new puzzle arrives every day.