I have the best idea ever!! (lie)
I've not added much to this site recently because I'm out of ideas, but I recently discovered Universal Paperclips and that inspired me. I'm gonna make something similar, but fish. Almost backed out of this because vibes.fish exists but this is different.
You catch fish on a cooldown, and hire fishermen with your fish (fish currency is peak). Above that you buy fishing nets, and then fishing boats, and then shoal spotter planes or smth, and it just keeps going up and up until you use fish in a fusion reactor or smth.
Will have a seperate section of the page to buy upgrades for your producers, like a better rod for you, better bait for the nets, etc.
Not entirely sure how the code is gonna look, but I imagine just a game loop that increments your fish based on producers, and a bunch of functions triggered by buttons to buy stuff.