Side Note: because it seemed so daunting to try creating a game with ZERO UI (given my understanding of the term UI), I basically gave up on the constraint (as I saw it) and included UI elements such as menus and on-screen instructions. My thinking was this: if I can't do zero UI, I might as well try to make a game without unnecessary, overly expository or graphically imposing UI. Despite that, I don't expect to score highly on the 'zero UI' rating. 🤷