So thanks to the prodding topic, I did grab this last night and play through what was there on the steam copy. My impressions are pretty solid so far, but cautious.
This game was Kickstarted in 2014, and since then has completed the game engine, design functionality and about 1/4 of the road map content. The game includes content through the stone age and stops just shy of converting your world to medieval times. Considering it took 4 years to get that far, and that the game is supposed to end with space colonization, I suspect this game will be in early access awhile. That being said I thoroughly enjoyed the stone age portion that I played through. There is a fairly deep simulation going on here, and I was able to play through it without any hiccups on a 3840x1600 ultrawide monitor and it was very smooth. It was fun to watch your nuggets (people) go about their lives. Each person has about a dozen stats associated with them and some have quirks and perks. There is an awful lot of polish in the game already and I think they will have a hit on their hands if they make it to the finish line. It is evident that the game will need a balance pass or two, as the progression has some areas that go by way too fast, and some bottlenecks that make certain progression way too slow.
It took me about 4-5 hours to play through my civilization to the end of what was available. I did not struggle with keeping everyone alive, but had some moments where things could have definitely went south. So again, with more tuning this could be a challenging sim, and not just a society builder (which I like).
All in all, I’m really happy with what I saw, but unhappy with how much of it was there after 4 years.