What an amazingly detailed, complete experience! Love that you even included multiple endings. Absolutely fell in love with the little characters, and great use of pride flags in some of the fish designs. The fact that this was done solo in two weeks blows my mind, and the ending boss fight had me totally invested in the story. Really love the animation of the hair when swimming for some reason -- it just makes me smile :D
Only real piece of feedback is that it took me WAY too long to realize you could kill the enemies. I think because I tried once with the saws, but it didn't sound or look like it did anything, and then I tried again several times with the sturdier enemies that only go back and forth, and since they take more hits to kill, I gave up before trying more XD. Having damage show on enemies would go a long way for the game feel (or introducing an enemy in a less high stakes way, like trapped with just enough space for a fish to reach it). After I saw the gameplay gifs I went back and had a MUCH easier time (even if my scientist girlfriend drowned in the end T_T -- would also be cool if there was a save point before trickier bits, btw!)