Picked this up on a whim during the Space sale and it's not bad for 37 cents.
It's a mini-book - one sheet of paper which folded makes 8 pages.
One page is the cover, two describe an interesting background setting and the remaining actually flesh out a decent RPG system.
The minigame wants to be a self-contained game, but IMHO these would work much better if the RPG framework was a mini-book all to itself and the setting was given more detail and room to breathe, including only scenario-specific equipment & rules.
Still, you could fill an afternoon with this, and possibly have it lead into something larger, but it's mostly an idea/setup that would be better used in some other system.