Hey, I was thinking of doing a longer writeup of this year's Global Game Jam, but since I can't seem to get around to it, here's just a link to our game, called Beatroot. It was implemented by using standard web technologies (canvas 2D API, audio element) and playing through it should not take more than a few minutes of your time. We had a fun 48 hours making it, and I think the end result reflects that.