A game device permits generation of images of objects moving through a virtual space. The game device permits generation of track data by sampling at stipulated intervals of time the track along which a first moving object has moved, setting of transit points at stipulated intervals of distance along the track, and moving a second object in such a manner as to pass through the transit points. In addition, the games device permits allocating a second moving object a new course to avoid a collision where the second object is likely to collide with an obstacle while moving through the transit points.