The concept, while not new, seemed interesting. Though the game is really punishing if you don't manage to get a high enough score which really makes it difficult to play. Plus when I did manage to get pretty high on a few of them the hit collision seems very imprecise due to the things you're dodging. I feel like removing the "get over 10 or it gets harder" would help a lot. That and maybe adding a setting for people without mics could be helpful? Fixing that and making the objects you're dodging clearer could make this a pretty interesting game to tackle.
Just as an addition, it seems as though you approached the theme backwards??? The less points you get, the less microphone volume you get. The more points the more microphone volume. So I'm not sure about that portion.