I love the game is based around this "minigame", but maybe some instruction on how to do it. Other than that i only have a bit about the background, maybe make it a bit like an harbor or something similar, to give the players a feeling that they are actually fishing somewhere
I love how the story turned out, especially the interaction with sis. The backgrounds maybe need a little love, just so you know the difference between the rooms. Maybe a bit more gameplay, but otherwise good