ANSWERING YOUR OWN QUESTION AGAIN DEPARTMENT: Don't ask me to explain this, but to navigate the boot menu you have to hold up on the joystick while tapping the down cursor key on the keyboard. And I was right, get past that and the emulation is superb, bringing some real curios to the Pi. (For many years, the Tutor had the ONLY home-TV licenced port of Scramble, the only other format to get one being the Vectrex. Quite a brutal version of Mr Do as well.)