If you use premade assets, or unfinished projects, you must specify what was made before the jam. Also, the majority of the game must be made during this gamejam. If most of your game ends up being made before the start of the jam, it's just not fair to those who have been working extremely hard, losing sleep to try to meet this deadline, when they started with nothing.
Join the discord and we can chat about it, and you can show what you started with.