They took the firefly out to make the game more real because in real life some fireflies are poisonous to frogs. What I think they should have done is when frogs eat the fireflies, some of them give the frogs a poison effect. AND BESIDES IF THEY WANTED THE GAME TO BE REALISTIC. ALSO THEY WOULDN'T HAVE THE ABILITY TO LEAVE TREES FLOATING AND HAVE TWO OTHER DIMENTIONS AND A TON OF OTHER THINGS. Like bruh.