the game should be harder in the "late game". im here with 3k people, 650 happiness and 4k gold.
maybe some other monsters like the dragon (ok i met a kraken once but he never came back). some kind of diseases and missfortunes would be cool, so you lose some % of your people or gold and maybe some kind to prevent this like a doctor, which is only good later, if you accept him too early he will do something bad or other challenges. the game at this state is fun but to short and you can press yes withou thinking to much.
some more ideas
-fire
-a mysterious man (with strange questions?!)
-bandits
-a prinzess
-switch something up if you answer a question to often the same way
- add a "keep silence" button for more tactical decisions