In some cases screenshots cannot justify changes so next years Remastered Game Jam I will make it 2 screenshots and to just give descriptions of changes or descriptions of updates :). You can look up the game Epic Wings as a reference for an example as that is what I am updating daily for this Jam before I submit the project :). Take a screenshot of a text document with the changes made vs what is used to be :)?
As this is the first year for this Jam, I can understand that rules are little foggy and I can guarantee that next years Remastered Game Jam will be a little more clear with all the feedback received! This time around what I am doing is simply updating my old itch store page for that game and submitting that to the Jam so that I don’t have 2 store pages of the same game as I do not want to separate download traffic between the old one and the new one however I can see the benefit in creating a new page for the Remastered game as that would make it so that your game shows up in the new releases categories. You’re free to take any of the two paths and free to choose the path that benefits you the most :).