Well, considering the message-queue, it should be fully possible to make the cells into "animals" instead: They mate by randomly picking another cell's "genome"

Well, considering the message-queue, it should be fully possible to make the cells into "animals" instead: They mate by randomly picking another cell's "genome", take 50-50 from each of the cells, and make this the basis for the new cell. It would sound like it would be smart to start off with the extremities. Say, start off with the same amount of 100% agressive and 100% defensive cells. They mate, get a 50/50-cell, which is partly both. If a combination of 10% agressive and 90% defensive is "the secret", then the cells will eventually all become that combination in the end. Now, the question's whether this is a tactical approach or not...