I somehow ended up fitting almost exactly in 8 pages (it's a shame I didn't have the space for a cover).
As for the hardest part, it was definitely formating the document. The choose-your-own-adventure style of my scenario made it really vital, too. I had to check every numbered paragraph for potential discrepancies. But at least I learned how to make internal references in OpenOffice Writer, so that's a new skill in my book!