Good work! i got upto 900+ then just quit.
I like the concept, and audio used.
i was confused as to what i was doing as there was no explanation of sorts.
it would be great if there was a goal to the game, as once i knew what was happening, it was like... okay.. why am i playing?
as the health to collect, was appearing at a constant, and fish where coming to me, i can just aim for that, and get it, theres no real way to win or lose in game.
It would be great if you added (as per ur comment above in "use of the limitation") which is for you to illuminate the deep sea, that you added some exploration, going through caves, other variety of fish, maybe ones that are bigger then you that could kill you.