I published a ZX Spectrum videogame at Microhobby Tape Nº13 – 1986. I was 15.
I was a pre-adolescent learning things about computers. My parents gave me a Spectrum 48K and in one week I was typing BASIC code.
One weekend I did a little game that got published on a national magazine. It was a simple mineseeker style game … years before windows one got on the run. There are some abandonware sites with references to it: