Site: http://icculus.org/pyddr/index.php

Pydance is fun dancing game for experience asian dance beat! Showing friends your hot move with big score!

Highly configurable, colorful animated arrow motion, limitless numbers of dance steps, 1 or 2 players, professionally written music, laughter provoking sound effects, and yes, even graphical transitions.

It depends on pydance-music, so the installation from terminal will be slightly different. Open Terminal and write:

sudo conary update {pydance,pydance-music}=@fl:2-devel