good... but
TOO FUCKING HARD
Though it is almost identical to the more common variants, this does include bosses in an interesting way. The "double kill" is great :) The shark appears randomly and is quite painful to avoid (I originally thought it would just go across the screen like the other fish). It's not good when it reappears almost immediately after I get eaten by it/other fish. It's also a bit difficult to judge sizes, though the colors help a lot. I find it strange that you would get killed by fish of your own size (100%?).
For n00bs like myself, include an 1/0 life mode, or at least allow us to continue where we last got killed.
Good effort, good game, but too hard.