Hey! Thanks so much!
In order to use the full screen button you have to be clicked into the game window first and then you'll be able to press the full-screen button. We totally get that it feels like you're having to press it twice to work. It confused us too until we realized the first click was just entering into the game window and the second was actually interacting with the button.
To answer your question about the "special sauce," we created this game in about 48 hours for a game jam and the theme was "unexpected twist" so we had this concept of a cute cozy game but the twist is that you have to poison your mean customers to move forward. Since then we've made the "special sauce" optional for players who have requested that, but that's where the concept originally came from and we wanted to keep the sauce in the game to stay true to the initial concept and game jam. 😁
Thanks for taking the time to try out our game and leaving some feedback! We love hearing from our players. 🤩