In case anyone is interested,I have started working on the project and it is now called "Push your buttons". As mentionned I'm making a new game engine for it. I've put on a prototype at https://yo252yo.itch.io/push-your-buttons with password "wip" though obviously this is going to change a lot.
I'm no longer seeking coworkers, I'm sure this work will be controversial and I don't want to inflict this on anybody else.
The topic has changed, away from the balfour declaration to the story of the story of robinson crusoe to be more pallatable to non far-left-ists. My hope is that once the game engine is made, I can easily add a "DLC" for the balfour story, and it could become a mega engine for all kinds of leftist storytelling.
Everything will obviously be free and open source