This looks like a really interesting jam! I've just got a couple of questions about the rules.
'The submission must include a complete narrative, not just a setting or playbook,' - just so I'm clear on this, do you want something akin to a specific encounter/series of linked encounters rather than just (e.g.) a description of a village and its inhabitants? Most of my experience with pre-written adventures comes from old D&D magazines, which might be roughly right, but I'm not sure! Are there any example scenarios you could point me towards so I have a better picture of what you're looking for?
I'm not entirely sure what 'Every submission to this jam will add two community copies for To Change.' means. Do you mind explaining?
Thanks.