>>15124844
Pic is from 1993. Not every game used the same kind of art style. And ZZT, which preceeded it by only a couple years, was plain text (well it used the entire set of printable DOS characters, not just the lower 7-bit US-ASCII).
As for trying to limit modern games to a small size, don't forget you have to cram all the libraries in there too. Otherwise it's cheating. When you installed a DOS game from floppy, it came with everything it needed for sound and graphics. You could run the game on a HD with fresh DOS install and nothing else, and it would work fine (no dependencies, other than the hardware itself).