I got excited that we would go to the ruins and found more about how to end Dia but I got the end screen :( I'm sorry you didn't have time to finish it. Regardless my excitement shows that this is a potential story to expand in the future in this setting or a different one.
Gameplay: I also got the ui bug and I got confused if I actually got ambushed or helped. It's great that actually you have to be careful of what people to trust and help. Another thing that might be nice is to use the right click mouse to choose an answer rather that push enter. Or if just use E for both choosing and moving the dialogue forward. I was always trying to find which key to press. (This is just for user experience)
Very nice job!! :)
(Btw I am reading Mistborn atm, and it gave me similar vibes with the Dia being "god" etc, I don't know if it was an inspiration or just a connection I made)