I think that dev of games must implement AI to design more levels. Difficulty can be managed eg. from the depth of movements. Many itch.io games have very few levels which is somewhat disappointing. However, this will mean for each game a separate AI model design? ID. then users test levels and keep the best ones? I liked it! Music, chilling, difficulty, design, everything. The other way is to open source and let users design levels, and then upload them.