Headbang concept sounds really fun, I'd love to play that as a fan of rhythm games, but wow my neck would hate me I think. I am no George Fisher in that regard
I think maybe Muse Dash type with two lanes would work for this type of input device? More classic VSRG (vertical scrolling rhythm game) wouldn't play well with headbanging in my humble opinion. Alternatively consider making a Rhythm Heaven type game
