Pipe Link

Controls Goal: send water to every tile of the 6x6 board through pipes connected to the yellow source in the center. Controls: tap a tile (mouse or touch) to rotate its pipe 90 degrees clockwise. On a keyboard move with the arrow keys and rotate with Enter or Space. Water: pipes connected to the source fill with blue, and water only flows where two open ends meet (a gray tile has no water yet). There is no way to rotate the other direction. Score and ranking: the time taken, shorter is higher. The clock starts at your first tap, the game ends the moment every tile is blue, and there is no pause. Every board is built to be solvable and always needs at least 20 rotations. Tip: start with dead ends (single-opening pipes) and the corner and edge tiles - turn them so nothing points off the board - then fit their neighbors one by one.