Apparatus and a method of operation manipulates the display of an object on the display surface of a display device in accordance with sensing touching contact on a touch panel, superimposed on the display surface and simulating movement of the displayed object in accordance with the characteristics of the touching contact on the touch panel adjacent to the displayed object image. Further, object data defining the display of the object image for each of a plurality of different states of the object, display information specifying the shape and physical properties of the object and the current display position thereof and file information relating to the stored data are stored and accessed for interpreting the simulated manipulation of the object by the characteristics of the touching contact therewith, for correspondingly manipulating and displaying the thus manipulated object image.