I participated in Global Game Jam 2013 in Singapore with a few friends of mine from Game Development Group of NUS. The theme of the jam was heartbeat. Here's a preview of the game:
At some point of the jam, I jumped into some parts of the game programming due to the time constraint that we had and extra programmers were needed (the main programmers were Chunmun and Richard). Notably, I coded the traps' position randomization and the collision detection. They weren't up to my expectation, but they did fine. The game engines were actually made by Richard, and Richard and Chunmun made some other game with that engine before, thus our game developed very fast, just that the many numbers of mechanics involved means extra work was needed.
After our game could run fine, we need to add the sound, because it was a mute game. I made the background music using Soundation, an awesome online free music studio. I made the BGM, but then it sounded to bland, so I added the dubstep bit. Turn down your volume when playing. The sound effect was made by Sandra. I also felt the ruin-kind background image was a little unpleasing on the eye, so I made the grassy plain background.