Thanks! Here is how it looks so far. The Civilizations randomly spawn spontanously, they slowly level up through the ages, they always have a chance of going extinct. Until they reach level 13, where they become interstellar. I will replace levels with Age names e.g. Bronze age, Industrial Age, Singularity age, etc.
I will give the player a bit of control in the simulation though, so far you can only control speed. The simulation's main purpose is to understand why we can't we find alien life all over the milky way. I'll make it so that civilizations can form alliances and declare war with each other.
What do you think about it?