Please, let game designers and artists be. This is not a founded project, this is a itchio prototype. Honestly, get that bs off of your head. And think of it as a good tool for early development. People thought pictures were a "cheating kinda artist thing" 50 years ago. And it hasn't taken the place of modern artists. It has made them able to see things around the world that people otherwise would never.
Coding and designing consumes a lot of time, so that, is obviously okay for someone to use AI in a for-fun, independent prototype.