In order to minimize differences in a pushing speed of a user pushing control elements of a controller in, for example, an entertaining system, arising from differences in the body weights of users, the gives instructions to a computer running software depending on the pushing pressure of the user on the control element connected to a pressure-sensitive device of the controller. The controller is set up to instruct the user to push the control element with at least a maximum strength. The value obtained when the control element is pushed, is stored as the maximum value. Based on the maximum value and a pressure-sensing value table defined in software or various pressure-sensing values, a new pressure-sensing value table or various new pressure-sensing values are generated.