The background art (red-tinted art), the same one being used for the book cover, and the illustrations within the book are all created with AI and Photoshopped by me. (It's explicitly mentioned in the book credits.)
The art for the other two games is primarily a photomontage created by me in Photoshop. All logos are my own.
I hope this doesn't hinder you or anyone else from trying and enjoying this game.
Actually, these are all placeholders for the art I'll create later. (Although the game is on hiatus, it's still in development.)
Thanks for your interest!