nice game! Cool take on the theme. The music choice is perfect for this & gives it a nice relaxed atmosphere.
I think you could really expand on this though, rather than it just be about eating the fish and getting the highest personal score you can get. Maybe have a leaderboard, or different "skins" or fish types you can unlock with those points. Think about how you could make a game like this even more engaging to the player, to make them WANT to play more! Getting the highest score is good for a moment, but not really sustainable. This could really bring this game to a whole new level, but you have a nice start, so good job!