Lovely entry and a really great way to pay tribute to someone you love :) The artstyle and ambience fit the vibe really well and the story was beautifully told. I liked the loop of the game also - some mechanical activity combined with a progressing story. The fishing mechanic itself was easy to learn and fun to do.
A few suggestions in case you decide to build on this further - The fishing mechanic implemented was solid, but it was pretty easy (and thats perfectly fine if youre going for that) but it could have some more challenge without it being too overwhelming - check out cult of the lamb fishing mechanic - you can add on to what you already have to give it more depth and add a little bit of challenge especially when you are reeling back the fish, I think you had the tension and alignment but i didnt understand how it factored in the equation as i always caught the fish.
Overall great job on this! Art and music are great and the sound effects fit really well. Congrats!