The demo scene was also very active in the 90s. I made some stuff back then as well with friends, never anywhere near as good as this '93 winner
I just found it on my backup drive, tried to run it in a DOS box but just as my own old programs, glitches and other problems abound. I get the start screen then black. But can confirm Second.exe is 1,451,093 bytes, less than your avg picture nowadays.
That music brings back memories :)
Problem with my stuff is, dunno how to control them anymore and have to read the source code now to figure out what keys to press. Not that it helps much, I didn't believe in documentation yet back then haha. Plus I lost a bunch of stuff in HDD failures :/ Oldest I still have is from '95