Lol, funnily enough, I did pretty much the exact same thing regarding learning C at the age of 12, ended up writing an OpenGL game for the PlayStation Portable which I released for the Neoflash competition:
Since then programming games was always my obsession, and just a few months ago I fulfilled my life long dream and got a job as a gameplay programmer at Ubisoft.
I did the same! https://www.youtube.com/watch?v=l9yyLlstPtE was my first C program, unfortunately I don't have a job at Ubisoft, I didn't continue with game dev but went for web.
http://www.neoflash.com/forum/index.php?topic=4924.0
https://www.youtube.com/watch?v=wAF9o8dsHfA
Since then programming games was always my obsession, and just a few months ago I fulfilled my life long dream and got a job as a gameplay programmer at Ubisoft.