I liked the transition of menu to game and the idea of "Only one note" and the model was funny and the idea of it instead of being a guitar being uhh...the thingy that I forgot its name is cute too since it's only one note, and of course props to music as well, buuuut I kinda missed..always, even when I got the hits right in the center of the square thingy! I can't tell if I am missing something or if it's bugged tbh.
Edit: also love the thumbnail!