http://members.cox.net/swt2/Tendrils/
Well, sort of. It's a typical dungeon-crawl but combat is played exactly like Dance Dance Revolution. Even better is that about 95% of the game's graphics and music has been "borrowed" from other video games so it's kinda weird to have Simon Belmont and Rydia in your party fighting the Sinistar while music from Donkey Kong Country plays in the background.
Oh, and it's free too.
Kristine