I agree, Earth C isn't much of a setting, and a visual novel in the style of Friendsim/Pesterquest would be a great way to remedy that. Becuz that was already done, with Alternia.
Would I would say Alternia had a lot more exploration than Earth C does, I think we often ignore just how much it helped expand the setting from "cryptic meme joke setting" to "cryptic meme joke setting with a little more depth".
As for the title. C'mon, y'all. Of course it would be called Tales From Earth C.
-- The Butch