Apparently it's possible to add your game to the submissions after the deadline, but for this I need to give you a private code that will let you do that. itch.io does not seem to provide a way to contact you in private, so could you try to get a hold of me on IRC sometime tomorrow on Freenode's #godotengine channel? You can use http://webchat.freenode.net/?channels=#godotengine to login if you're not familiar with IRC.
