The natural world is a very complex place. Organisms interact with organisms, as well as the natural terrain, to create food chains and webs. It's very complicated as factors can change due to disasters. In Go Eco, you are looking to be the first one to complete a full food chain. However, it's not as simple as just putting down cards with one animal eating another. The game is up on Kickstarter now.
In the game, the player to first play out a full food chain, from primary producer through decomposer, is the winner. However, there are many things your opponents can do in order to stop your food chain. They can, for example, play a Neutralizer, which will halt your food chain until you can cancel it out with an Energizer. Or they could play a Trapper card, which you'd have to counter with a Guardian. It's a rough and unforgiving world out there, completing your food chain won't be easy.
The Kickstarter campaign is up and running now. They're just a bit over halfway with still 10 days left on the clock.