Game is still in demo (obviously), but I have some minor things that.. in all likelihood you're already planning to add..
Most importantly, some indicator of which fish you're supposed to catch- either on screen or through talking to her again
It'd also be helpful to increase the chances of catching the specific fish you need- I caught 4-5 of every other fish before I managed to get 3 roaches.
Other than that, I'm excited to see where this game is going and I'd love to get some more story and dialogues!