You are correct. There is a lot of stuff more i need to implement. I had those things in mind too but because of limited time on my end i wasn't able to use the full 7 days like i wanted, so just releasing the game as long as it worked and it was somewhat fun was my first priority. Audio or visual feedback is really important i agree. That was one of the things i wanted to work on after but didn't have the time. And yes Mr. Natafish was going to be more important to the story and appear more but sadly i had to cut his dialog down to just 2 appearances. Thanks on the feedback, if i work on the game after the Jam I'll definitely work on these things, especially explaining the mechanics so its easer to understand. :)
((btw the shop usually appears little bit later when you fail to catch the faster fishes))