An area, in a virtual game world, for arranging a plurality of objects and a minimum allowed distance between objects to be arranged therein are set. A position of an object is changed for temporarily arranging the object to an arbitrary position in the area set in the virtual game world until arrangement of the object is finalized, and the distance between the temporarily arranged object and an object whose arrangement in the area is completed is calculated. When the calculated distance is equal to or greater than the minimum allowed distance, arrangement of the temporarily arranged object is finalized and a plurality of objects whose arrangement is finalized are displayed on a display screen.