Discord will only exist once I am satisfied it won't sit empty, which is what I track through feedback form. There's also a form on FA for bug reporting though I didn't anticipate to get any audience from itch... like at all. I was thinking about making separate threads under the game here, but that removes the comments so I didn't figure out how to go about it.
Yes TFs from multiple source currently aren't checking anything mutual so it's a bug. I'll eventually get to it. I can't seem to replicate your elevator bug, but I made sure to reward players who glitch out of the map. No area is meant to be unseen, they are just borders so people don't walk into void by default.
Demo completion works by crossing an invisible line between level 1 door and the note, which I moved for the next version to be all around the not. Teaser notes these upcoming updates and what people can vote for, not what's there. If all that was made the area would be just implemented fully already. Thanks for the feedback!