I really like the vibe of your game especially the music in the water is so chill and relaxing also the fact that I was baited to think it was a game about skipping a stone and then you go underwater, it's cool.
However i tried for some time to understand what I needed to do and tried to bring the corals to the fish, i think i worked for some because they disapeared but not every one. And then i didn't understand what to do with the box.
The concept is original however