User blog comment:Godstick/Difficulty of Mystery Quest Versions of Levels/@comment-16894369-20140115085556

Not sure if it has to be included in the infobox, but it can be included in the Difficulty section, briefly mentioning some details for 2 stars and 3 stars (that should take care of quests, also).

Or, how about an independent section of "Getting 3 stars/Getting a high score"!