Hi!
Sadly I can't give a detailed review about your game and it's mechanics.
Since for me the fishes mostly did not render. Sometimes I just died without seeing anything. Sounds I heard though. There was also an error message in the console.
Also I could only control the fish in maximized window mode. Which is why I thought at first that it was completely broken.
After about 30 tries to play it somehow I gave up.
But now and then I could play a little bit, which I really liked.