I read the Roll Up! system and I don't understand exactly what you want people to make. The system is just an oracle . Do you want people to make new oracles?
Viewing post in New tabletop game jam!
I’m hoping to some interesting new games that use the Roll Up! mechanics. Here’s an example of one I have created: https://hlashbrooke.itch.io/rolling-raceway
You’re right that Roll Up! can be used as an oracle on its own - I purposefully designed it to be versatile enough to work that way, while also functioning as a system reference document for people to use to create other games.