I really like the general atmosphere of the game. The sound design, colors and post-proccessing really add to the calm and slightly eerie ambiance.
I will also add that controling the fish character was quite tough, but i understand that you struggled with its controls. I also wasn't able to find the first keys in the very first mini-game - I think it would be good to leave some sort of a clue about its whereabouts, like a little part fo the keys peaking out of the shadow and such.
Great job on your submission and congratulations on finishing it!