The zoom doesn't work properly yet, sorry.
I didn't think about that to be honest. Do you think right clicking for movement would be more natural? Right now it's used for deselecting things but we'll see.
The camera moves around with the arrow keys, S probably opened one of the menus. They should close when you right click somewhere but I will probably add a close button in the future. Producing from the buildings is a bit unique for these kinds of games, I can see it being difficult to figure out. The way I plan to fix it is to have the game cycle through all the idle units/buildings before you can end turn like in the newer civ games but let me know if you have any other suggestions.
Thanks for the feedback!