Hi everyone following this thread and curious, TheDutchMagiKarp was so kind as to direct me to the pinned message in discord that clarifies this:
Now for some frequently asked questions:
Q: Can I update my game after uploading?
A: No you can't. File uploads are disabled. Don't try to, because if you delete your game file in the process you also won't be able to reupload it and therefore not have a game.
So, you cannot make any changes whatsoever during the voting period :)