Still in the Forest World (4th) and about to go to the lake world. I backtracked to collect all of the moons that I could before more unlock at endgame. So far I cleared out the first three worlds and I am almost done the fourth. At that point I will finally advance the story...god only knows how many hours I have truly put into it as I lost track today and my Switch won't give me an estimate for another week or so.