some sounds fx indicating when you caught something or maybe even an Exclamation point showing on top of the player would of been a great idea to add, also some sea or ocean background noise would of made the experience better, also a mini game when catching the fish would of even been better! like a simple stop the moving bar in the red zone, type mini game, would of been awesome! or like a press the space bar as fast as possible, type mini game, all those thing would of seriously made this experience very very good!
otherwise nice job! hope that feedback helps you out in any sort of way, I gotta look out for my fellow slime now