I don't know if I'm doing something wrong, but I couldn't get any fish added to my counter when I left the minigame.
Regardless, you did great work with this one. Really cute, beautiful art style and music choice. I especially love the atmosphere of underwater, where you can hear the bubbling alongside the fun little music. Charming.
I think the fishing minigame was well done. It's fun to collect as many fish as you can before the time is up.