i could see this either becoming a pocketable gadget like a Tamagotchi or maybe a tiny desk toy that you wouldn't mind stealing a minute of your attention. there are a few todos already on my list, including adding a reset button to quickly regenerate a new population.

i'm aware the ATTiny85 has EEPROM, truthfully i'm still a little nervous about burning the memory out but i think it could be useful for small extra functions like storing the seed of your current population in case you like how it turned out :D