This is an iOS rhythm game I've been working on during weekends. The player makes the stick figure dance to the beat of the music by sliding their left and right thumbs. They need to move the yellow markers towards the green circles just as they are about to disappear. The player also gets to choose any song from their device's music library.
(Edit: 35 MB download of some blurry footagehttp://bit.ly/pTjIOq
Here are a couple of screenshots (programmer art warning !)
Right now I just have a first cut of the beat detection and 'choreography' routines up and running. I'm trying to make sure the beat detection works fairly well with disco/dance/pop songs (since that is the theme of the game), rather than handle every kind of genre.
I've also made this HIG-violating animation editor. Later on I hope to make it available within the game itself, and also create the infrastructure for players to create, upload, share, and rate their own dance moves.