It's been about six months, so here we go!
Style.
It's okay to write short punctual sentences. But make them flow. Like this. It's equally okay to write long, verbose rambling sentences that read like a missive written from dusk to dawn, only a candle for company over the rolling expanse of a night stained of ink. Like that. Attempting to make every sentence read like this is a sure way to fatigue the reader, as well as keeping the ones that work from standing out as they should. In short, don't try to show off, it only alienates the audience when you inevitably slip up, in however small a way.
Setting.
There was a lot less confusion about this after I made it explicit in the description for the Steam release. I also took to heart the advice I got multiple times that felt simply referencing the setting and how you intend to approach it can allow the reader to visualize your world better than lengthy descriptions.
Characters.
All feedback on them was positive, and people felt they could differentiate between their signature writing styles. This is great, as I never had any explicit mental rule-books for making their styles distinct, I just hoped it would show naturally. Going to definitely capitalize on this in future, and go further with character driven narratives.
Navigation.
Almost everyone found this difficult. Still not sure of an easy solution to this, but some sort of map is a must in future.
History.
Those who the historical references clicked for, it really clicked for. However, with others the hints would just go right over their head. I'm thinking that an introduction in the forward would work here, doubly so in an interactive medium where it's very easy to both make them optional, as well as giving readers a way to dig deeper if they feel like it. An interactive timeline might be fun as well.
Engine.
You can find more about it here, but I don't really have much more to say on this other than that it was totally worth it to roll my own.
That's all for now unless anyone has any further questions!