172 Hours on the Moon - Protagonist and Antagonist

I am reading a book called 172 hours on the Moon, and I am half way through. There are many different stories going all at once, these are the stories of the protagonists. They all have the same goal, which is to go to the moon through NASA's raffle. Except the ages of the characters is from 14 - 18 due to the raffles requirement. This is where the similarities end. The conflict of this book so far is man vs self. All protagonists are facing mental difficulties because they have a difficult life and are simply using this raffle as an opportunity to return back to normal or simply said using this opportunity as a therapy tool to step into fame and easiness away from the dark times they are in now. Another conflict that I think will occur is man vs supernatural. All blurbs of this book available are hinting towards some encounter with extra terrestrials or something supernatural. That is also who I think the protagonist is. An alien who will try it's level best to destroy the humans or intruders.