Muggle Studies is essentially a treasure hunt game, with a few puzzles and riddles. Fortunately, it is not just a treasure hunt game: the faithful and imaginative rendering of Hogwarts, and the protagonist's personal journey both pull the game up from its less than auspicious structure.
Muggle Studies, like other works of fan fiction, requires some knowledge of the original works to be fully appreciated. Like many people my age, I grew up reading Harry Potter books with each new one being devoured a day or two after release. A lot of my friends were into Harry Potter fan fiction, but it's never been my cup of tea. That said, the exploring of Hogwarts and the discovery of the world of magic is more compelling in interactive fiction. The use of the second person lends immediacy and intimacy with the environs that is lacking in a typical graphical Harry Potter game where you play out someone else's troubles from the distance of a third person perspective.
Though it is written in the second person, you play as a very concrete individual with their own history; and the weaving in of Alice's personal story through reminiscences and flashbacks adds both another layer of mystery to the story and gives greater emotional depth to the exploration and subsequent discoveries of the game.
If you're a fan of the Harry Potter series then playing the game is a must.