Yes, some of the images are currently AI-generated placeholders. About a quarter of the assets are hand-drawn by me so far, and the goal is to eventually replace all AI images with original artwork. Right now, my focus is on building a solid, functional base game before diving fully into final visuals.
As for the writing, I'd estimate around 80-90% is my own. I largely use AI for copyediting or generating bits of flavor text, but the core narrative and most of the prose are written by me.