I myself isn’t really that good at building, but I think that you should really add more details to for example the roof but I believe the windows looks pretty good.
I’m assuming you’re not going for anything super detailed, which makes sense, so the building itself isn’t terrible. But its not really what I picture when I think of the eastern front during WW2. I typically imagine rural russian cottages and factories like this:
I’ll assume that building looking thing is all you have so far. I would say that at this point you should wait to get feed back once you have a little more put together. You are asking for feed back on a WWII game that is currently only a single building in Studio, you don’t have a game yet.