British computer game programmer Matthew Smith was 17 years old when he programmed the legendary early platform game Manic Miner, back in 1983. I spent a lot of time playing Manic Miner and its sequel, Jet Set Willy, as a kid way back in the 1980's, and it's been a huge and direct influence on my Odboy & Erordog series.
I just recently found this wonderful fairly recent video interview with the guy, who seems like a fantastically likeable guy with a mildly autistic-seeming manner. It just makes me very happy to watch. :) The interview starts at 3 minutes in.