I think this is the nicest one of your music games. The stomping bars fits well to the music theme. However, it's really really annoying that you have to submit your score (which opens a new website) before you can play another round. Also since this is a music game it would be great if losing would trigger a sound.
Would be nice to have way more different enemies in the game. Also the animation of the enemies look a bit disappointing compared to the fantasitic animation of Mr. Fancy Pants. =)
Nice simple idea, but definitly needs some refinement. Some suggestions: Increase the framerate and move the fishes at a speed not higher than 4 pixels per frame to make the movement smoother. Also it's to almost impossible to get all of the fishes, because the speed of the pivot is too slow. Include a sound for catching a fish. Do not use negative score, because it's rather disencouraging.