Arun

Nice idea but I don't think the temporal sphere should work infinitely. Rather than it being "craft it once and you are set for life" it should be an active block and not a passive one. It would consume a temporal gear per activation and last only a certain amount of time.

I agree with what others have suggested. Other than that the ocean should absolutely have its own monsters. Rather than having the ocean floor be relatively high like in minecraft there should be great depths with monstrosities and treasures of its own. I imagine depths so deep and dark that you have to craft high end equipment to even see there. I definitely think there should be a nice side to the ocean too, like islands and wildlife but also abominations and lovecraftian horror.