Yay yeah he is! I remember playing Icy Tower for hours! [1]. Love his game designs and aesthetics. If I get it right, I first came in contact with his work when I was learning allegro [2], but TBH I'm not sure now. I think he used to use allegro in some of his games!
1: https://en.wikipedia.org/wiki/Icy_Tower
2: https://www.allegro.cc/