The theme of the game jam was "Only One" and we chose to make a game you play with only one button, so a golf style game combined with some 3d platforming elements was a good fit.
I made the code, most of the textures, all the 3d models, 7 of the maps, my friend made all the sounds, music and 8 of the maps. We used the FTE QuakeWorld game engine to achieve all this, and NetRadiant Custom as the map editor. Blender for models, GIMP for texturing, SunVox and audacity for audio stuff.
I think our teamwork resulted in a great game for such a short timeframe. Going for "Diamond" ranks ended up being a lot of fun even for me.