It's an interesting concept that you have to maintain the ecosystem while it's growing bigger and bigger. But I don't feel like there is much to strategize right now. I can easily get a ton of energy and I just keep placing stuff that seems low and everything works out fine.
It doesn't really give me any other feedback if I'm doing well or not. It's important for the player to know if he is going the right direction or not. Maybe using a bar or some stats that show if the ecosystem it doing okay or not.
It's still a bit buggy and I can't really tell what's going on when the screen is full of animals. But still a great concept that can be expanded on, to either a incremental game or more strategic game.