GoldRush is a strategy game that is played with programs, suitable for events like hackathons or coding challenges. You create cities, recruit units and mine gold. Player with most gold after a given number of rounds wins. This is the only non-trivial game project I have ever finished.
I am currently exploring Castle Game Engine and learning image manipulation in Gimp and to a lesser extent 3D modelling in Blender.
I have developed a multiplayer game in Perl/Pascal but have abandoned the project and made it public, you can see it here.