I like this game but it needs more. It would be fun if you added a multiplayer mode where you help other players. 



Also add environmental Hazards like underwater volcanoes to the ocean please so that players will need to navigate around them.



Also add weather events like storms and currents please.





Also add a day and night cycles please.




Also add customisable fish that allows you to change the colour of your fishy characters please.





Also add some graphics to the background like sea rocks, seaweeds and more fishes please.




Also make the bigger fishes open their mouths to eat you please and when you touch them from behind make them turn around and eat you please.