The vector of the shadowed characters seem to be jagged and the right hand looks squarish..
Some of the lines can be improved as I do see color leaks too..
But you do have a nice concept and adding the music brush is a nice touch.
Happy 13th Birthday by the way! You're so young! :D
I can't even wall, what say, vectoring when I was 13. So, keep walling! ;)
