The rules say I MUST start from scratch. Am I allowed to use some utility code I've written before for other games? Eg. a scene manager
nope. make it in jam. copy/paste allowed. dont duplicate files to start. copy and paste after you first made the project/game/thingo
Actually, we do allow use of premade assets and code. Just make sure you don't completely copy-paste a premade game.
Of course, that's not my intention, I just need a general purpose scene manager script I made.