maybe you could add a special minigame for each town, like catching bugs in the jungle, or growing crops in the farm town.
maybe a game for the water town where you fix pipe leaks, and for the city, it could be something to do with music maybe like Friday night Funkin or guitar hero. For the empire town, it could be something like a festival where maybe you shoot off fireworks and you shoot different ones at different places. For Stonehenge town perhaps some physics based game where you try to stack rocks in a certain way. And for the shark town it could be some sort of fishing game but instead of taking fish you take trash out of the water and have to avoid getting the fish. It would be cool if you unlock a “Minigame” option after you trade enough with a town and then beating the minigame unlocks a medal and a bit of currency, then afterwards you can just play it for fun. Maybe the medals could just be another thing to earn. I know this would all be pretty hard to do, so you don’t really need to do all this, but I just think these would be some cool ideas that I would love to see in this game. Btw, I also got all the items/fish in the game so I think this is the first game that I’ve ever 100%ed.