Bit late for questions (Considering there is 1 day till the jam) when you said plugins aren't allowed, are unity packages (In my case probuilder) allowed.
Allowed yes, but it will count slightly less in the originality judging, and possible cost any chance of winning a prize. As long as you are learning from it and have a high community spirit score, you can make it into the honorable mentions, if your game if well made.
