Thanks for playing the game ^^
Yeah I agree about the fishing. The visual clue is ambiguous, the audio clue exist but maybe because there's so many happening, it's not really noticeable. It's the metal sound that you need to listen to.
The sound being very crackly probably because of the browser I guess. Wasn't really sure because it's the first time for me this happened.
The browser and the Unity Editor result in very different kind of audio quality.