This game had my eyes bouncing back and forth between the middle and bottom of the screen as a frantically tried to defeat Voi'Vouno!
Sometime's I'd get into a trance-like state while somehow managing the chant while dodging stones with my mouse. I played it a few times and got close to beating the game. Maybe with a few more tries, I'd have been able to beat it. I think it's a difficult game without being too difficult. Something you can easily start and with a bit of practice get the mastery of.
Cool concept! I enjoyed it.