Yes you can, however this is a Ranked jam. Which means once it is done it will go through a period where the entries will be rated, and during that time you are incapable of updating your game. So be sure to make it as functional as possible as you won't be able to patch any glitches during the rating period, and if for some reason you accidentally delete the game from itch.io you won't be able to reupload it until the rating is done.