Blow is also attempting to build a programming language [1], based on his experience in game development. While I don't agree with his direction, so far, watching the process is very interesting. The next Jai demo was announced for Feb 11th [2].
Actually, he's been doing this for a while. When he was at XCF at Berkeley in the early 90s, I had contributed to his FMPL (Frobozz Magic Programming Language) project, writing MUDs in it. (I wrote a Dikumud/D&D like system).
He's a wiz, and his C code was humorously commented that makes it a joy to read.
[1] Jai: https://sites.google.com/site/jailanguageprimer/
https://www.youtube.com/user/jblow888/videos
https://news.ycombinator.com/item?id=8541509
[2] https://twitter.com/Jonathan_Blow/status/563766250711425024