A predetermined time point is added to an accumulated value of the time point in accordance with lapse of time. A special effect and a special effect applied value set to the special effect are stored when specification of the special effect is received. When the special effect applied value is subtracted from the accumulated maximum value of the time point, the special effect is applied to the player character. When specification of action commands is received, the received action command, an action command value and a received order of the action command are stored. The action command whose received order is the earliest among the received action commands is activated in the case where the accumulated value of the time point is the action command value of the action command or more. The action command value of the activated action command is subtracted from the time point.