This is quite a fun game, good job. same kind of vibes as Friday Night Funkin' but with more buttons lol. Highest I got was 1000, I'm not very good at hitting random keys - skill issue on my behalf XD
Mike's bobbing animation is quite cool too, I like how the guitar has the wrong chord when you hit the wrong key. I would suggest maybe slowing it down slightly when mistakes are made, just so that the player can get back into the fast paced feel again. Nice game!