First had this for DOS, was blown away that even just the intro could fit and run off a floppy disk. Also the first game I played that got my 486SX's PC speaker to create grainy but decent sounding music and SFX!
while the thing did fit on a 5" 1.2MB floppy and ran fine on my 286, i do recall bringing this to a friend on multiple 360KB 5" floppies, and being amazed to discover it ran, albeit with serious framedrop, on his 4.77 Mhz PC XT computer after unarchiving the game to his 5MB HDD.