Thanks for your feedback! Since you've obviously never seen it you send me down the rabbit hole of finding the missing help screen. Apparently the help button fell victim to my last UI overhaul and which meant the help screen couldn't be displayed. I fixed the issue and have uploaded the new version hoping you'd find the opportunity to try it for real this time.
I am aware of the lack of life in the game. Only it's more complicated in 3D and a matter of having time for non-essential stuff. I'm just a hobbyist. As for the Vienna vibes - Vienna seemed the obvious choice to me when I could chose where in the world to place my "Kaffeehaus" game. You were almost right - I'm German. You too I guess?