Awesome game! Loved the story, and how the game changes the more treasures you collect. The gameplay loop is also quite fun! The artstyle is very neat, and the background song sounds quite soothing, though a bit more variety would be welcome, like maybe adding more instruments/sounds as the song gets slower? The only thing I didn't like about the game was the unnecessary "am i in a game?" cliche, the rest of the writing is good, but i felt like that one didn't add anything to the story and was a bit cheesy, though this is a very minor nitpick.
(also i love how not only do you literally dive deeper into the water with your fishing hook, but you also "dive deeper" into the mystery, a combination of two popular ideas this jam)
Very well done!