User blog comment:Olaf-Tiffi-Odus2711/Halloween Level Design Contest/@comment-24954875-20141101123109/@comment-30095342-20141101132546

Olaf told me that the levels were graded according to their perceived difficulty (ie: harder levels were judged better under this system)

This contest was clearly designed with me in mind because I've cooked up several hard levels in my time :D