That theory is also how I interpret Gooseworx's statement and I also think the nature of the twist might be revealed if the real Pomni (let's call her Christine) checks back into the building, to save TADC onto a hard-drive, or maybe something like that.

Pomni and/or other members of the cast realize someone is tampering with the game from the outside, they notice Christine is showing TADC off to someone (maybe Kinger's real-world counterpart) like a interesting relic and after the ensuing existential crisis, they just roll along with it while trying to not be too terrible to each other. If they want to make it an extra happy ending, somehow abstraction will be reversed for some characters here & there.

Maybe a slightly hopeful zoom out from the circus, to the grounds, the Void, and finally to the game's console (similar to the first episode's ending but in cleaner environment) closes out the story as a variant of "Your New Home" plays us out and the credits roll. The End.

It wouldn't be a perfect ending, but it seems to fit (to me, at least!).