Facebook is showing a message about the game shutting down in December and being made with Flash.
The game isn't shutting down or made with Flash.
Facebook Gameroom is shutting down next year and Unity games will be removed July 2021, this is why I made the windows version.
I don't know why Facebook sent this message, but I have no way of contacting Facebook as they give 0 support but their blog states Unity games ( Native games ) will be supported until July 2021.
I am trying to find a way to contact Facebook to confirm the date, I expect the message is just a mistake.