On Greatmathgame.com, you can enjoy playing Pipe Flow, a free online puzzle game that is both entertaining and challenging. Your objective is to connect pipes of matching colors from one end to another and fill up all the spaces on the grid. As you progress, the difficulty level will increase, making the game more demanding. Keep in mind that completing the colored pipes alone won't be enough to accomplish each level, so take your time to find the right connections. Don't rush and enjoy the game! You can control it using your mouse.