It is a deck builder where the played cards become buildings in a growing city. Each building synergizes with multiple other ones, especially surrounding population count. You lose when you let 3 things get out of hand, symbolized by red alert symbols in the top corner. It is an interesting idea, but I have seen it implemented better, for example with Roots of Yggorasil, which is doing some similar stuff, but with much more varied (in a good way) objectives and interactions. I got this in a humble bundle. I am glad I tried it, but I played it for a couple of hours and moved on.