I expect there are back doors or secret codes that when entered will give them diamonds, or perhaps a code that will advance the clock so there is no need to wait for anything to finish. I expect they can put their city into any chapter, set their AW levels at will, or produce any building at any level.
It is actually reasonable for them to have this capability so they can test new code without having to wait on the clock.
When they are playing, they will not experience the game the same way we do.
I cannot t point to anywhere to prove to you that this is true. I know there are back doors built into computer operating systems that would provide access to developers without the need to go thru any security password. Apple even has a way to get into locked phones but will not share that with anyone. Elvenar developers can navigate thru their code.
Requiring the developers to play Elvenar the way we do is not possible. They are aware of all the cheats.
If they do this they're not really playing the game. Which defeats the purpose of the original suggestion. Which is that devs play through the game so they can learn first hand how stuff works and improve the game. Although it might be an interesting experience if a Dev who has only played the first few chapters WAS to put in a cheat code and instantly advance to Ch 16 or so. I am betting they would be pretty lost because they have skipped so many steps.