Well done OP!

I've been thinking about doing this for the game I've been working on and you've inspired me to put some energy behind accelerating it

Please add a button to disable a background animation (or just remove it). It adds visual noise and is so distracting I closed the website after reading a couple of sentences.

The flow charts don't fit on mobile. Also, I would lead with a video as that's surely what everybody wants to see, it's a video game after all.