the green was too harsh. i think you should have stuck to only a few similar colors instead of the entire rainbow
the ending was too abrupt, you cut it off while he was saying something
took way too long to get to the "drop" or fast part in the song, 50 seconds in?
The song, for the sake of montage/edit, should start right where he says "I love you".
And this, imo, is a hard song for Toribash.
Tried it once myself.