Patent ID: 8012020

Claim:
A game device comprising: an input receiving device that receives a moving instruction input for instructing a first object in a virtual space to move; a first moving device that moves the first object in the virtual space by the moving instruction input received by the input receiving device; an input history storage device that stores the moving instruction input received by the input receiving device as input history information; a second moving device that moves a second object in the virtual space by a moving instruction input stored in the past in the input history storage device as input history information; an assessment device that assesses whether the first object and the second object are overlapping or not overlapping in the virtual space; and an alpha value storing device in which an alpha value for the second object is stored; an alpha value recording device that records one of: (i) a predefined alpha value in said alpha value storing device when said assessment device assesses that the first object and the second object are not overlapping, and (ii) a second alpha value indicating complete transparency in said alpha value storing device when said assessment device assesses that the first object and the second object are overlapping; a display device that generates an image depicting one of (1) the second object at a transparency degree associated with the alpha value stored in the alpha value storing device and other objects in the virtual space if the value stored in said alpha value storing device does not indicate complete transparency and (2) said other objects in the virtual space if the alpha value stored in said alpha value storing device indicates complete transparency, and displays said generated image.