A spherical background object 510 that is substantially centered around a head of a user 516 and has a predetermined radius Zb is set in a virtual space. Icons 514a, 514b, and 514c are dispersedly disposed in the planes of a first layer 512a, a second layer 512b, a third layer 512c, and a fourth layer 512d, which are concentric spheres encompassed by the background object 510 and different from each other in size. A menu screen is drawn by identifying a normal vector 517 of the face of the user as a line of sight in accordance with posture information related to the user's head, setting a screen 518 in a vertical plane centered around the line of sight, and projecting a virtual space object onto the screen 518. An icon reached by the line of sight in the menu screen is moved toward the user in the virtual space.