Hey! Sorry this is actually my first time participating in this Brackey's jam as well so I can't really comment on what can or can't be allowed as I'm also unsure.
I too, want to update my game's description and also put out a new build to change two lines of code that adjusts the game's difficulty, but I notice that doing that will update the game page and am unsure if that constitutes as making a change. I think you can ask the mods to be absolutely sure if it's allowed (and if you do that, I'd also like to know too haha).
I see you've played Stormbridge, thanks for trying it out and please feel free to let me know your thoughts or critiques on it if you have any, as I am also trying to learn and improve on it! :)