Nice - Alice in Wonderland meets Utopia - I feel it is the start of something, I would like to see it expanded, the ideas played with, not as the next great novel but a chance for your psyche to process the concepts - You have left it open you could go fluffy, spiritual even dark (it is all fake, a show).
You definitely painted a few pictures with it but it could use a bit more depth. Maybe describe things a bit more, people don't normally just open mysterious doors and quickly step through... take your time, what do you see? Technically vertigo is not like fainting at all. With vertigo all sense of direction is turned around, behind becomes the new down. Whereas fainting is becoming light headed and passing out, sometimes loosing consciousness.