Since I submitted my entry with very little time left, I didn't put too much consideration into the presentation.

If I came up with a better title and cover image for my submission, would it be possible to change it or is it against the rules?

Thanks in advance!

I wonder the same thing. I wanted to re-upload an audio file because then I noticed a couple of mixing details that I'd rather fix that no one's really going to notice so it's not worth it, but it wouldn't be any significant change really. I would understand that it wouldn't be fair or possible to be able to do that, I won't, but I would also like to know if it's possible to add more detail or development to my submission regarding the imaginary game and what I did and all that.