This game definitely seems like a good contender for the Best Use of Multimedia XYZZY award specifically for its map 'feelie' attached to it, which is a complex map that folds and unfolds multiple times.
That map is an essential part of the game, since it marks the main treasure or objects you're looking for.
Those objects are Golden Snitches. The idea of this game is that the programmer made a real-life treasure hunt for his daughter, hiding four golden snitches in the house and creating a map that reimagined their house as various locations from the Harry Potter series.
The game itself is sparse in comparison to the lush map. Your father, Papa, follows you around, serving as a hint system, and rooms he doesn't enter are unimportant, as he feels no need to give you clues in them.
I was struck while playing with the casual, unaffected display of wealth. I've been both moderately wealthy and moderately poor in life; in my youth, my father was a video game executive and supported 7 kids in a large house with a big backyard. But his business went under, and years later after my divorce I've experienced food scarcity and can't afford a reliable vacuum or a washing machine. With that background, this house seems quite magical, with a balcony over a grand hall, a spacious backyard with water features, multiple secret passages and hidden rooms, and multiple rooms for the child, including their own bathroom. It feels like reading British books like Middlemarch (which I've been doing), seeing the life of the upper middle class or lesser aristocracy.
The game itself is charming and full of love. The two areas that I think are drawbacks are the sparseness of the room descriptions and the lack of implementation of several objects mentioned. For instance, when I first encountered the bookshelf, I couldn't X BOOKS.
As a final note, the Harry Potter themes are heavily prevalent, as a heads up for people that have strong feelings towards JK Rowling.