Hi, I'm considering using Unity for this game jam, and I've worked in it for a while so I have a couple random packages I like to bring in when I start a new project (Save Game System, Audio Manager, random helpful systems like that). Would this be allowed to be brought in or would the rules prevent this for this game jam? Thanks! Very excited for it :]

Bringing in existing base code and packages is perfectly fine, since rule 5 only applies to things made specifically for the submitted game.