Lots of interesting things to do in this game, though it's not really about fishing. But I'm a sucker for exploration games, so I spent quite a bit of time just swimming, wandering and mantling about. Nice foundation to build this into something more elaborate.
Perhaps my biggest complaint is that this came as a RAR file and hence the itch.io app can't install this, so I need to do so manually. The archive also doesn't contain the Visual Studio runtime, so I have to go find this manually and install it if I don't have it installed already (like if I want to run this in a sandbox, for example). Unreal Editor has a checkbox that lets you easily include the redistributable files in the packaged build, so make sure to always do that.