Cool game!
Art and music were great, my favorite track was the jellyfish theme!
The fishing itself is pretty fun, although knowing music notation can make it a bit easy.
Didn't manage to get all 12 fish, only got 11.
Only gripe I had was with the catching worm part. Once I got enough I pressed the escape key but that only closed the fullscreen, and so I thought that it would stop automatically and only after having caught 30 did I try to press escape again after leaving the fullscreen.
Great job!