Extremely easy to play yet not that easy to give up.Adjust pins by pulling or dragging them.Make your way trough pipes.If you've been looking for a pull the pin puzzle game for a long time, it's time to explore it. water flow game, puzzle game, pipe puzzle, pin puzzle, mobile game, .io game, addictive game, challenging puzzle, strategy game, water flow challenge, problem solving game, brain teaser, stickman game, online game, free puzzle game, easy to play, hard to master, flow puzzle