I'm making this the most fucked up way ever - trying to do object programming in AutoIt. And, the most funny thing at all, it works.
I'm done writing the "new game" option, it currently creates saves and puts them into .ini files, so that whenever you feel like cheating you can always change it.
Also, you can run basically any part of the program itself as all the "classes" are in separate .exe files. That makes global variables a bit difficult to manage, but I do it using config global.ini, and it reduces copy-paste to minimum.