I enjoyed this one a lot! There isn't much direction, but the actual fishing mechanic is interesting and i had fun with it. I got the 60 net upgrade and wrapped around the rock feature outside the harbor. Perhaps if you were to develop further, things like that could offer a special catch. I wasn't able to determine if there were any different fish from different areas. Admittedly, I eventually just sat right outside the harbor without any real reason to venture further away.
Excellent submission, i enjoyed it!