The gameplay in The Mysterious Disappearance of Mr. Lovecraft is simple: you just have to tap wherever you want to move your character. With a double tap, you can run. That said, your character doesn't exactly shine for his physical abilities, so you can only run for a short period of time.
At a certain point in the adventure (practically at the beginning), you can find two special objects that let you play in first person and use a map. The object for playing the adventure in first person (a sort of floating eye) is incredibly useful to give you a better perspective of everything happening around you.
The Mysterious Disappearance of Mr. Lovecraft is a 3D graphic adventure that's directly influenced by classics like Alone in the Dark. It's a game with an outstanding atmosphere and graphics that, while not especially great, look awesome thanks to an excellent use of illumination.