When it comes to pushing lots of water through lots of pipes over long distances, nothing works better than old-fashioned gravity, something the Romans figured out and carved into stone more than 2,000 years ago. Might there be a way to tap into those rushing underground rivers and generate some sustainable hydroelectric power without slowing down the streams?
This game was made for free to support UK's Red Nose Day. Rotate the pipes by clicking on them 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. One of the most popular flash games ever. It's had millions of plays worldwide.