If it helps, I could make a walkthrough of the early game. Already made a trailer, but that's more showing off what's possible, rather than walking people through.
5k population is the cap, so if anything, I'd add a trophy when you get there ;)
In terms of additional controls, I think most major macroeconomic things are already in (or at least the ones that don't need a textbook page of explanation). I was thinking of allowing players to manage hamsters on a more micro level, being able to see the companies they work for and give certain companies monopolies/breaking them up, but that would have been a whole other can of worms. Tell me if you're interested in seeing that feature in the future