Yes, yes, the title is a bit of a clickbait. The game doesn't simulate socialism nor democratic socialism but aims to illustrate a hypothetical way toward socialism in the US via social democracy within the span of two administrations. If you play well and if you are lucky you you can get way beyond what any country has ever accomplished though.
I'm working on a game set in a squarely eco-socialist future (~20 years from now) and prototyping kind of sequel/complement to demsocsim that goes beyond the institutional/electoral level. Stay tuned.