Thanks for the message!
1. I'm in the editing phase at the moment, so hopefully we'll catch anything like that, but yes, that should be an until end of the round not turn ability. Anything that's reactionary should be a bit more clearly stated. Thanks for spotting it though, I know there's a few little things like that here and there.
2. That's an interesting question and it sort of came up recently between myself and my editor when we were discussing how Charlotte would run the game as opposed to how Samantha would, because I think they would approach it very differently. I think the answer there is really 'either'. You can play it as a linear dungeon crawl as written, or use the provided rooms and bosses as something of a starting point to expand the labyrinth into something bigger or different. For example, the route down is left intentionally unexplored.
Thanks, I really enjoyed creating all of those bits and trying to tie them into the themes.