I have finished my first Ludum Dare game.
I made it in C# and XNA. Hm, maybe I will post it to Xbox!
You need a Windows PC. Sorry Linux and Mac I am learning PyGame to make this a non-issue in the future.
Here is my bitbucket page if you want to look at the ugly mess of code it is.
Here is the Ludum Dare page.
Here is a video and some pictures.