I think copying and pasting code is not allowed according to the rules.
The rules say: “No premade assets are allowed in this jam. That is, no art, sound or music assets. All the code, art, music, sound and design must be made exclusively for the jam, within the duration of the jam. So no making assets for the jam before it starts.”
Idk if that means you can’t copy and paste but I wouldn’t copy and paste just to be safe