I guess he programs in D. I think he uses OpenGL for his rendering too.
His games can be picked up and played for 15-20 minutes, even though they are played for short amouns of time they don't really fir the minigame feeling. They provide fun for the casual player and even more fun for serous players who understand the deeper mechanics and play for pure score. I presonally like rRootage and Parsec47.