Press flag to set up project, press space to play/pause. Click on the board to change the cell, and press e to select cell type.
the ruleset is fully customizable inside the and variables. the variable has the actual ruleset, the variable has the cell colours. Simplified rulesets only need the default cell colours though.
simplified rulesets are made by having the first item of be "L". They work in the Born/Survive format, as in B3/S23 for Life. Instead of having it as one text string though, the second item of is the B rule and the third item is the S rule. If you don't already know about life-like cellular automata rulesets, here you go
The helper blocks for complex rulesets are very simple blocks, they usually just report a list of their inputs, but they're designed to make complex rulesets more readable.
Edit: my information was wrong, so look at the wikipedia article instead. All of what I said was pretty much just me guessing (I only knew about conway's game of life, I didn't actually know who john conway was).
Keep in mind that conways game of life is something conway (I think a math guy) created decades, if not, centuries ago. It has also been remade millions of times by different people, with different rules, and more. The idea is not owned by anyone, so anyone can create their own version.
JOHN CONWAY!! He is super cool and one of my favorite mathematicians. He did stuff with finite groups, knots... so many cool things. He died in 2020, RIP.
Yeah, most od what I said was just educated guesses (I assumed he was a math guy, so that was pretty much all I got correct). I did also leave a link to the wikipedia article, so people can get the true information.
and 
variables. the