My 12 y/o daughter recently ran into a "does it run DOOM" reference in media (I think a graphic novel-- not sure) and asked me about it. I got to explain the phenomenon and show her some examples (she found the pregnancy test to be particularly amusing). I'll have to show her this one.
Realistically, I would've stopped the moment BASIC worked, called it "good enough," and then gotten distracted attempting to write a Forth for it.