Hey there!
The judges talked about this rule and updated it to this.
"Majority of the code must be made during the jam."
We hope this rule will simplify the specific details while keeping the spirit of the jam open to all skill levels and resources.
Such things as game engines, visual scripting, and plug-ins are allowed. (as already mentioned)
Code libraries and premade player controllers are now allowed, too. Although, they shouldn't be the bulk of the game.
I hope this helps!