Pretty fun at start and I like all the different tools you get, and the fish are awesome (though they always tried to drown me as effectively as possible when carrying something out...), but get's boring really quickly, so I stopped after the thingy after the gun (it didn't even give me an item, is it broken or does it do something else?), and the movement way too slow and clunky, which I don't really like. The backgrounds should have parallax, because now they look really static, and the water needs some kind of effect and more underwater backgrounds,currently it's just a solid color which looks boring, (also why can't you jump out of the water, it would be very cool), the top of the water also needs somekind of outline, because it just cutting looks really weird (the wobbly water top animation is very cool though), also the player should go behind the water, so it's gets a blue tint when underwater, and doesn't look the player is just somehow above the water. Also getting attacked by something feels really shallow, I rarely even realize when a shark or something attacked me, it needs a sound effect, camera shake, and maybe flash the screen red so there's some impact when getting attacked. Then also WHY NO POST PROCESSING, IT WOULD FIT THIS GAME SO PERFECTLY (and yes, im that one annoying guy in your videos comment section that always complains about postprocessing, or at least one of them), but like actually, the lights look very cool, so bloom around them would look so good, please, just add post processing, I put some effects with paint.net over an image under the comment, and that's just about bloom and vignette and some color adjustments, there's many more cool effects in Unity, and it would just look so good. (above is with and under without)