I think that what is beautiful about this simulation is that it works on its own. Its not a game about creating ALife creatures, its about seeing a life (or ALife to be more specific) growing, evolving and getting more and more complex. And I think that saving that from the player choice will be the best.
Oh, bye the way rendering a natural selection its really is (at lest compere to other amazing thinks that the developer made in this amazing project) @MIvluu if you don't believe me you can see his videos about it I'm highly recommend https://www.youtube.com/c/TheBibitesDigitalLife