My god, you built a whole world in there! Cool style, nice music. I did not get to far, unity does not like my setup (mouse is crazy sensitive and it always uses my upright monitor). Still ran great and was enjoyable to play.
A fair solution would be a slider to setup the sensitivity. I think it is bad to force into a certain sensitivity that might be uncomfortable for the player. Everybody has an individual comfort zone in this. Next time I will consider this!