Just watch em do his thing. change sliders to whatever you want. Version is X.Y. Z where X is sprites, Y is scripts and Z is blocks.
This and @TVTREXBEAN 's sim was heavily based on "I made an evolution Simulator (with silly little guys)" by Icoso on YouTube. (https://www.youtube.com/watch?v=f7vH2Li9KOw) @TVTREXBEAN did almost everything, but i made some changes and i think its better now.