In retrospect, I was perhaps much to literal in my interpretation of the brief and way to conservative creatively in the idea I went with. This was probably due to the all the horror stories I heard of many people not finishing their game. I had alot more time than I thought and I'll plan accordingly at next years Global Game Jam.
Also, lots of people seem to be using Unity here at AIE Sydney, which has convinced me to make the transition. Countless hours were lost coding collision detection in C# and XNA 4. Observing from many of the Unity users, collision detection was a mere drag and drop affair leaving much more time for the design and creative process.