That’s a fantastic idea! Game jams would be a good way to test our visual novel framework. I will look into it - though at the moment we have other priorities.
I totally understand the work involved in making assets customizable and thus truly appreciate you sharing them! I made a web utility that allows people to quickly browse and experiment with your asset packs: https://methodox.itch.io/character-customizer-2d All credits are given. Please let me know if that works for you: it doesn’t pack the assets in them but downloads your uploaded zips on-demand.
Interesting to learn that legends are not always considered fairy tales~