This makes me think of an experimental game a while back involving a blind person in a zombie apcolypse (I think), the flaws are generally from little feedback than sound. While indeed, a blind person has no visual sense, they still have other senses working with them, specifically tactile. So, there is a great disadvantage to just using sound. Either way, I guess my point is that it's too difficult. I want to enjoy it, but I cannot learn from my mistakes when the only feedback are sound, which gives little to nothing than timing that is near impossible without trial and error, and button mashing (which I did on the first level) Perhaps have an easy mode where you get a kind of sonar effect, because people won't be able to enjoy themselves as much unless they have a sadistic streak. Overall, it's good, just too damn difficult.