You realize that cardinal directions, East, West, North, South, are terms humans invented, right? If I'm in London, New York is closest to my left, West, if facing North. If I'm in Honolulu, New York is closet to my right, East, if facing North. The opposite if facing South. There is no hard and fast top or bottom or left or right.
Lastly, people in Australia are not hanging upside down. Just ask an Aussie friend.
I know they are not hanging upside down - I am using the scenario that if the world was a globe then they (or at least someone) would be hanging upside down.
Regarding top, bottom, left or right. Just because there are no hard and fast rules doesn't mean the earth (if it were a globe) would not have a top. Everything else in the natural world has a top and a bottom. Why not the earth and the planets? Do the planets not have a top? Who says they don't?