I like the idea, and the sensitivity menu is perfect for calibrate (miss in many voice controlled games).
But for me it's way too hard !
The game looks visually peaceful and relaxing, but it's not because it's very hard at the first second, so it became a stressful experience.
Please, if you don't want to change the game, make a chill mode where touching "walls" don't kill but just give "less point" maybe ? Or something else not serious... But no punishment like that please.
The music looks really great, I want to ear this nice music, not to be killed and retry, then retry, then retry. For now I feel that the gameplay and the difficulty don't feat the mood.
I want this experience to be a pleasant journey. :)
Have a nice day. ;)
Mat