Very cool idea! The way you worked with the fishing hook and the puzzle mechanic was very clever, however I do think it is counterintuitive to the average player. It took me a bit to figure out how the hook actually worked and what it did with the fish, I think describing it as "swapping" in the instructions may be a little clearer, but I was able to eventually figure it out. I also wasn't entirely sure how the fish were collected, as I kept trying to put my hook on top of the fish and that doubly confused me because that would move the fish. Once I figured it out though, it was super fun! Great visuals, very charming!
Nice work :D