Feel free to edit stuff! This is more about keeping things in scope for the short casual jam than a strict limitation. Just as long as a majority of the game is not custom assets you’re good to go! Feel free to use the character generator. And use any plugins you want, of course following their terms
Very casual vibes here, don’t worry! More just about celebrating the engine and all the community effort that’s gone into it over the years to keep it cool. Go crazy get weird!