Nice game... Was surprised with the amount of life in the ocean. Good sound design and however, the rotation of the sharks need fixing. Not sure they are much good at swimming sideways.
Loved the game but instead of a timer to end the game I think it would be better to add a timer for breathing that gets replenished when you go back to the surface... And also a non visible timer that counts the time left to play, this could be shown to the player by a day and night system (pick up trash during the day and see how much you have by the sun set. then go again the next day)
Just a simple idea...
Well now that I say that I think I need to self promote my channel all about video game ideas to help creator, you might be interested😉
https://www.youtube.com/channel/UCYm9q-oI-7THyibtY2neIIA/videos
P.S(didn't initially write this to self promote)