I think the whole idea was interesting. Didn't feel like dance though... More like videogame music. Which isn't bad. Actually, like kingpoke said it reminded me a lot of dungeons or boss levels in old RPGs.
I know the idea was to feel the chaos of that moment, but there was something a bit too chaotic and not enough melodic in the end... to my taste anyway. I wish, with the description you gave, that it would have felt more epic and that the piano would have sounded more melodious and smooth... But again... that's my two bits.