I am looking to add AI art to my games as well, any tips on how to handle the growth progression when generating images (you did a pretty good job in your game), and I'm guessing you used NAI v3 or v4?
I got really good at using tags on a crappy free generator, but if you want good sequences then use a LORA to guide it or a generator that can do img 2 img editing. I use a generator on perchance.org, but I'm slowly switching over to civit.ai because it's way better.