Initially, a move target object is set from a plurality of objects. Next, a movement direction of the set move target object is decided. Next, for the decided movement direction, it is determined whether or not a rotation movement condition or a flip-over movement condition is satisfied. Next, when it is determined that the rotation movement condition is satisfied, the move target object is moved in a rotated form thereof in the movement direction, and when it is determined that the flip-over movement condition is satisfied, the move target object is moved in a flipped-over form thereof in the movement direction.