Water Flow Pipe Game is a water pipe puzzle game. Connect one water pipe to other to make the water flow and your plant growing. Tap, tap. Tube Master at Cool Math Games: Lay pipes between pipe connections of the same color. The pipes aren't allowed to cross, and you'll need to fill all of the. Flow Free® is a simple yet addictive puzzle game. Connect matching colors with pipe to create a Flow ®. Pair all colors, and cover the entire board to solve each.