Cool ..
Buuuuuut, what would be awesome if you have a evolution system, where when you eat certian fish, it makes you slowly grow more over into that, say you eat a winged fish, you gain extra fins in water, and the more you eat, the more over your ability to jump out of the water is gained, and the more control and cooler look when you become a flying fish, have more types of fish so there can be more diverse and odd fish, who will show up in the high score next to it, which would be totally awesome to see what kind of fish you ended with. The more complex the fish gets, the more complex its enemies become, and it loses traits and such as it gains newer and better traits, all the while becoming bigger and bigger-- and make it where the deeper you get, the bigger and scarier the fish get, so people won't be tempted to go so low ...
Other then that, the game was fun and light hearted.