I didn't know about the website, and don't know where to find it. As for selecting the saves, yes I know i can do that, but I don't exactly remember where I was the last time I played, so i might skip over things. But it also does not give you any of the things you may have to have gotten up to that point, mainly all of the achievements and the points they give you towards unlocking stuff for the helper girl.
I don't know how important she is to the story, but having to rely on the minigame feels like a bit of a grind. i'll look into the save if i can find it however.
Edit: Idk what to do with the 'persistant' file, it doesn't seem to work.