One of my favorites so far! Unlike most fishing games, it's neither too stressful nor boring, and it has a nice relaxing atmosphere fitting of an Ina game. And it feels like there is a lot of room for expansion if you wish to continue working on the game. One thing you could try: maybe have an (upgradeable) meter that represents your fishing line (how far you can go down), and instead of hitting a wall making you return immediately, each collision would reduce your meter, allowing you some leeway to make mistakes. You could also combine it with what kshut said and allow you to catch more than two fish, but give it a downside as well (such as making each fish making your meter go down faster, or to make collisions more punishing), introducing an element of risk versus reward. It would be cool if you could also sell fish and then buy stuff from a shop, or to have the Takos you craft give you some kind of abilities). Really fun and promising game overall!