A nice thing about this video is that the original software author, Marty Flinkinger, comments on it…
Thanks for reviving some old memories and for spotlighting this product I designed long ago. Amazingly, YouTube suggested this video for me (I do watch some retro tech videos, so…)
I regularly included easter eggs in nearly every product I designed. Didn’t have peer code reviews back then so it was easy to slip in just about anything (that would fit in the ROM).