Top Floor/ Question Mark Level of Tower

Does anyone know the meaning/ purpose of the very top floor of the tower, which unlocks as part of the epilogue?

Its symbol on the lift is a pair of question marks, and the floor itself is a sort of gallery of portraits and statues of villagers not in the game. None of the artwork is interactable, and the magnifying glass doesn't reveal anything hidden.

My only guess is that the team who worked on the game each created themselves as a villager, and they're all displayed on the top floor?