This is a screen capture of subLOGIC‘s FS1, the first simulator I’m aware of ever using:
FS1 was originally released in 1980; this is actually an image of the upgraded release from later that year or early the next, with “mountains”.
The screen image of X-Plane 10 represents 32 years’ progress in computing price-performance at Moore’s Law rates — that’s 20.667 doublings at 1.5 years per doubling, or 1,664,511 times the price-performance available to us on an Apple II in 1980.
As primitive as FS1 looks today, I couldn’t play enough of it when it first came out. I had access to an Apple II at the time and would run FS1 every chance I had.