This is REALLY not a game:
DDR ECS Thing
A downloadable project for Windows
This was my attempt at making a DDR clone while learning the basics of the Unity ECS system currently in beta. Funnily enough, what gave me the most trouble was trying to get timing on the beat correct, not implementing systems or components.
Anyway, there's no real game here. If you're interested, the source code is available at https://gitlab.com/hellocld/BGSjam12
Song is "Girl We've Just Begun" by Loveshadow, courtesy of CCMixter and a Attribution-NonCommercial 3.0 Unported (CC BY-NC 3.0) license - http://dig.ccmixter.org/files/Loveshadow/57925