so I was wondering after uploading the game I want to polish the game more and give it a more better experience

If you haven't found an answer:  I believe you can just update the game page from itch.io that you most likely submitted.

itch will allow you to as long as the final submission dat, ie tomorrow, hasn't passed. If you try to change it before the judging period is over your game will be removed from the jam and you will need to contact AngrySmile.