While we were discussing, the Poles got it done — judging by the screenshots, it looks fully finished 
The screenshots aren't mine; I took them from the town's page
But it all installs onto some kind of VCMI, some Heroes clone that requires Heroes files — I haven't figured out how to use it yet.
Here are the links to it and to the town
https://github.com/vcmi/vcmi/releases/latest/download/VCMI-Windows-x64.exe
https://github.com/vcmi-mods/forge
I'll dig into it 