Ah, the mighty ZX81 with a 16K ram pack, alongside a black and white telly and off course, the cassette player to load the game.
Sitting there for five minutes, listening to the screech of the loading screen, hoping that you’d got the volume at just the right level for the sim to load properly (otherwise it was a case of turning the tape over and trying again, after having adjusted the volume a fraction higher or lower), and then eventually you’d be presented with the fabulous graphics as shown(256x192 pixel resolution - and to think people complain about the graphics of MSFS2020!)
Those were the days!