Just for your information, you’re (partially) barking up the wrong tree. While Zombie Exodus was published by Choice of Games it was published as a Hosted Game. They neither wrote it nor asked someone to write it for them. The game was made by an independent author (@JimD to be specific).
And besides, do you honestly expect something that is explicitly stated to be
a thrilling 750,000-word interactive survival-horror novel by Jim Dattilo, where your choices control the story. It’s entirely text-based–without animation or sound effects–
(quote directly from it’s description in the steam store) to have a lot of, if any, pictures? It sounds to me like you made wrongful assumptions about the game you were buying, which doesn’t strike me as something you could blame on either the author or the publisher of said game. (especially since there is a free demo of the game available on steam)