You can only make your game within the submittion period, which is about 7 weeks away. Not saying that you wasted your time making your game, after all, practice makes perfect.
Yeah, you are only allowed to make the game in the 9 day submission period, otherwise they won't take it, but you can continue on this game and work on it to practice for the jam if you want
Yes, you can copy from your old game, such as extensions you've made or little snippets of code, but you are not allowed to make these things on purpose just so that you can copy them to save time later.
