Hey! I am playing your game again but I think I have found a bug. The evil fish seem to be not so evil since they increase my HP! All I do is let them hit me and my health increases. I am not sure if this is intended behavior. Also, I do not know which button is to shoot my gun.
Also: Since your game is fully html, you should consider uploading a web version to itch. Simply rename to index.html and pack into a zip, then upload to itch and everyone can play in the browser!