I'm totally in love with the fish's graphics! The audio design is pretty good, and the sound effect when I catch at the right time during the fishing is satisfying.
I think the core mechanic is pretty cool, maybe a few different variables linked to the type of fish would make the experience much better (and currently the experience is nice!).
Overall, I think having a complete game loop could be better because I don't know what to do with money. Maybe after the submission rating? I hope so!
You did a nice job!