Great concept . Since I love rougelike/lite and got to 400 coins (I'm not sure if I could even be killed at this point) I will comment on some parts.
Random spell effect for the buttons feels weird in an action game. In turn based games it makes perfect sense, but in a game like this looking at you action bar is not ideal. Since the best strategy is just using 3 fishes and then feeding them others, I feel like assigning 3 fish to the buttons while keeping others in the bag would have been better than a random one.
Then given a choice for the next room, having the same one twice is kinda meaningless.
Fishing minigame was fun but difficulty ramp up very quickly and made it impossible to get ant fish at some point(I guess game wasn't intended to be played for so long or maybe intentional commentary.)
Graphics and music are nice, enemies are fun, great job on the random generator, loved the feeding fish system and just the core game loop. Great job!