The time-shifting frozen donkey wheel
…and here's where things just get ridiculous. While the island is continuously moving through space-time, people on the island can make it move even more rapidly by going into an underground chamber and turning a giant wheel sticking out of the wall. Yeah, we have no idea how this thing is supposed to work either as it's not something that Stephen Hawking wrote much about in his Brief History of Time. But hey, if you love science fiction as much as we do, you might as well throw up your hands, say "Whatever" and just enjoy the ride.