Gekasan_RU
Auto-translated
There is no blue key. You can get the blue key from the prophet in the center of the map next to the tower if you complete his quest.
Added after 36 seconds
There are no factories because there are quests for resources.
Listen, I don't know if it's a bug or not, but in the second map, you move on with all your castles; for some reason, you don't get deprived of them.