Let It Flow is an interesting puzzle game for free. Get the water flowing to the crops and animals before time runs out. Rotate the pipes so that they connect from the pump to the crops and animals before the time runs out. Watch out for spillages, and don't forget to pump the water to get it moving. Try to make sure they are connected in sucha way that water doesn't spill on the ground. When you are satisified with the connection, click on "Pump It!" and keep clicking on the dial until the water starts to flow.