Hello! When the game jam started, folks participating (they'd signed up through a Google form) got an email telling them the 'what you need to know on Day 1' section.
i.e. to decide the characteristics of the one page TTRPG you'd be creating, there are a few dice rolls that decide what time and place your game is set in.
The form has made clear the participants would get a 'twist' emailed to them at some point. The optional rolls in the second part of the instructions are the twist. You can roll for all the options but you have to use atleast one result and incorporate it into your game. Just a fun design challenge.