Can we edit our Itch page after the deadline/during judging? Like to add better screenshots or change colors of the page?
(We had another 12 hours yes)

To add to that question, I wanted to make a WebGL build of the game but has some issues with making it work on itch (.exe is uploaded and submitted on time). If I manage to make it work tomorrow can I upload it (identical build to .exe submitted) or is this against rules?

No Data:
Yes, in itch.io game jams, you can further edit your game page as much as you like. (… and even delete your files, but not reupload them if the deadline is strict, so, careful!!)

(PS: not related, but using the opportunity: by the way, I ended up having almost no time to properly work on my game, so I only have a half-baked minigame prototype. ._. I am not submitting it, but I think I will test and review some games! And this was my first time dabbling in Game Boy development; I definitely think I will develop my game further, outside of the game jam. :) See you, people!)

You can edit the page after the jam. New uploads now that the jam is closed will be on a case-by-case basis. Please contact me on Discord if you need help.