One idea I think is building the game atmosphere and repeat the theme of 'biscuits' throughout. That is I think what a lot of similar games do. Like in papers please, they create the visual aspects to really let you feel that you are controlling the customs and who you let in vs deny really makes an impact. There is also some story development like a riot and revolts. In your game (this is a major shift), but maybe you can lean into a comedic factor and you are a cookie or gingerbread man and looking to thwart the factories that are mass producing similar cookies to their inevitable doom to humans. Just some thoughts and ideas but the overall gameplay mechanics is great and fun. so hope that helps!