Congrats on making a game! If I can give you some advice I would say to try to improve the UI stuff, also give the player some feedback whenever does something good (like upgrading and catching a fish). Maybe some versatility in gameplay would have been cool, so far I could only catch the same fish. no matter the level of my rod; also didn't understand why sometimes I would just "not attract a fish".
Hope this feedback helps for your next projects 😁