1. Yuuto knows about the Novel and he's ok with it. The Story is original and not really related to the Golden Age. Eventually The Art will change to be more original too.
2. So Soon in the Novel, There will be a bunch of activites you could do to get more into the story. The Minigames tab in the extras menu basically allows you to play these minigames without having to go through the story to play them. (Also It is way Easier to play over and over again)
3. I probably forgot to change Roger to Billy in the Files (For some strange reason) As I said before, This art was from Golden Age, And Yuuto gave me permission.