That's ... just ... epic!
It reminds me of how precise childhood ages can affect computing experiences. Even today I wouldn't be able to do that game! My switchover point came between the Commodore 64 being just too hard for me at about 9 to do anything natively, but the Commodore 128 had both advanced enough and I had a couple years myself under my belt, so by 12 I made what I would now jokingly call "A New York City Rush Hour Train Crowd Simulator"!
(Heh "Avoid the never ending masses of faceless people rushing at you"!)
But after that point, my overall interest in low-level computing waned, and I even formally retired from video games about 1995, except a few casual hobby-game dabbling. (I can precisely date it to just after beating Killer Instinct).