happy to hear that there are upcoming plans, and that you are having fun with it ^^
perhaps you can make new categories of fish, with greater rarity and new challenging minigames? perhaps upgrades to increase your luck for rarer fishies - and sell the ones you get too much of? I just feel like it'd be fun to really give more worth to acquire a new silly fishy :3
I hope to check out the page once you've gotten further though, to see where you'll be taking things.
by the by, I am a pixelartist, if you'd like a few more fishes and designs added to the project