This is LifeSim.
It was a pretty decent C++ project, log time ago, but was discontinued.
Now is reborn in bash!
Long story short, LifeSim aims to create an autonomous, simple but complete "virtual animal" which can eat, sleep, meet other LifeSims, spread, mate and so on.
This is an ultra-early alpha stage, so if you wanna try it's ok but remember..."nothing will work as expected".
CONTACT ME IF YOU HAVE IDEAS OR WANT TO GET INVOLVED!