This is a cute little game. My son is certainly fascinated by it. It is a simple premise and those that love building can go crazy with their personal faunasphere area. The breeding/mutation concept is kind of interesting, although I have trouble getting past the idea that all animals lay eggs. I started with a horse and it just seems so very wrong to me that it is laying eggs. Although I was happy to have a fun horse mutation by getting a unicorn rather than some of the creepier ones like four eyes.