I'd be interested in giving it a shot. I need a flag of Earth for a story of mine anyway. I assume the green and blue are obvious, but what about the gold and black? The power of a united planet and the darkness of space that it strives to reach?
I should hope so, cause you're pretty much spot on.
As an aside, the globe was created from the pagan terra symbol, so the Earth faction most represented by this flag is modern secular humanity. Besides that, the overall design and symbolism is pretty much Western (United Republic). Obviously, this is a small part indeed of our planet, so I'd try to make something representing a broader range of Earth in the future.