Charming custom graphics with matching music. Gameplay was initially slow because I chose to walk the wrong direction, and this happened to me twice lol. This was fixed when I tried the Z key for zoom though. The bobbing animation was cute, and I was interested in the scene change when a fish was on the line, I wasn't expecting that nice! The mechanics for the struggling fish weren't immediately intuitive to me, I didn't know if I needed to fill the red bar or avoid it, pull only when the line wasn't stretched etc, so it took me a while to catch my first fish. This was an interesting mechanic, but difficult to say where it fits on the fun/frustrating scale.
Overall a nice complete game with a good art style and generally well documented, well done!