I've been giving that some thought over the last couple of days and I think that honestly that's fine. As long as all the core functionality for the game is handled in one script within the assets folder.
I've added a ranking criteria for 'one script' so that people have the option to vote on your game based on the coding, and I have updated the rules so that you need to specify which extra packages you used during development - so just make sure to include those details in your credits somewhere.