Really loved reading this, thanks for sharing!
I've honestly not heard many stories from people playing the game, so it's really nice to hear! I'm really glad everyone had a nice time and got to explore some interesting character dynamics.
To answer your questions:
No, I don't see it as more of a one-shot game or a campaign game. I designed it for both. The game was initially conceptualized for a campaign though.
I've never seen that happen with the Enigma, but I think it's honestly fine that it went that way. Your table decides what comes up in your story more often, and I really love that about the system.
In response to this game requiring RPG experience, I don't think that's necessarily true but it certainly helps a lot. I think it depends on the person though. Experience with the genre helps, but so does just analyzing the game itself. There are a lot of paths to understanding.
Thanks again for all this! I'm so glad this game is being played at cons, it's really awesome.