I was at the GGJ again this year, and made a little game called Gears of Yore. The theme of the event this year was "transmission", so of course I made a game about rotating gears. Like with my other games, you can download it from my Google Drive and find the source code at my Github page. On a side note, I made it completely on my own, since nobody else on-site wanted to work on my project -- hence the lack of any kind of sound in the game (I have, in fact, tried to add some procedurally generated music later on, but it didn't really work). :-(