Im pretty sure either AI or some reused assets, cuz they don't have any in-between scenes, moving/walking just space and text then a photo that seems IMO TOO familiar either AI or slightly edited assets from somewhere else. Most of the "adventure" is through text no visuals, sure there are some but it's never up to snuff with the situation they are trying to depict IMO. If u can look at the CGs you will prob have just as good time.