Can you make powerups? Like a shield or a speed boost, And maybe a boss (giant fish) that will spawn some time into the game. More fish would be cool but you're already adding that. Maybe like a pufferfish that becomes large when its attacked, and a shark as the boss? You should maybe add sand on the bottom or somethin and if you go deep enough you will find special fish? I know i am asking much but i hope you will add some of my suggestions, Bye Great game btw!