Since then I've written a heap of others, all using the great Allegro library: Overgod, Lacewing, Excellent Bifurcation, Garden of Coloured Lights, and a couple of (not so great) Liero clones. Here they all are. They all have source code available and most have been ported to Mac and Linux (from Windows).
My latest game is White Butterfly, which looks like this:

, thanks to Tim W at Indiegames.
Who knows, maybe I'll write some more sometime. It's fun.