Ever since programming GOL in assembly on Z80 i dreamt of this.
Game for two persons.
The game runs, you can go back in time and modify by introducing gliders.
Only problem is, how to turn it into a real game, what is the object.
Maybe split the world in two and try building a stable configuration. The opponenent can launch the glider towards your turf, or something like that.
https://en.wikipedia.org/wiki/Critters_(cellular_automaton)