The infectiously rhythmic Crypt of the Necrodancer (I hardly even know her!) was one of our games of the show last year at PAX Prime. It's back at PAX East, so Holmes tried to do an interview while playing. On a DDR mat.
While you can play with a keyboard or controller, the dance pad is a pretty fun input method. Apparently the team found a guy who still makes those pads in this garage. They're thinking about doing a Kickstarter so you can order one if you want to play the game with it.
Now someone get me the exercise ball turned Katamari controller.