v0.4.1 is a small update, mostly cosmetic!
Faction colors have been tweaked a bit. Federation, Rebellion, and Polaris are darker blue/green/purple than the stock civ2 color scheme. Aurorans are red, and Pirates (Barbarians) are dark gray.
I've replaced vanilla city graphics with transparent sprites for normal cities (per Civinator's suggestion!), with a "listening post" space station for walled cities.
Roads have been replaced with hyperspace lanes.
As a bonus, trading commodities and some other flavor text have been updated.
And an amusing blooper: