Thank you! For the underwater monster I wanted to stress the fact that it's more like an animal than a monster, because maybe it's not totally evil, so I ended up using a very up close recording of breathing. That said, I will try to experiment with new sounds (or even music) for the monster as the game goes on.
Also yes, the game is set in New York: this is an homage to the 1998's Godzilla movie, which also had a monster and it was set in New York with never ending rain.