all I would like to see are like "footnotes" about the elements of the game, so also people who have never read or seen or heard about HP would know more:

"Harry Potter (a human, who was led to believe he was just a normal person until his XXth birthday and is the only person known to ever surviving the deadly XYZ spell) is the main caracter of the game"

"...to play Quidditch (a magic game, resembling basketball played on flying broomsticks. The game can be won if the Y of one team catches the X (a littel flying ABC) before the Y of the rivaling team does)"

"Hermione (one of the main characters best friends, and a very talented and intelligent young wizardess....) can be played in case the main character BLAHBLAH and then XYZ..."

That would increase the quality HUGELY.