GAME MACHINE, GAME SYSTEM INCLUDING THE SAME, AND CONTROL METHOD AND COMPUTER PROGRAM THEREFOR

PROBLEM TO BE SOLVED: To provide a game machine that can readily select a required option from a plurality of options classified into multiple categories.SOLUTION: A game machine GM1 includes a control panel 3 that has two small buttons BL and BR. The game machine GM1 selects one of a negative category and a positive category, each containing facial expression images SI showing different degrees of emotion, on the basis of an operation to any of the two small buttons BL and BR. The game machine GM1 selects one of the facial expression images SI contained in the selected category on the basis of an amount of operation to the small button, and displays the selected facial expression image SI in a game.