A slot machine includes a display device and a controller. The display device dynamically and statically displays circular sections aligned in coaxial circles with different radii. Each section displays game symbols. The controller is configured with the logic to: (a) determine a circular sector coaxial with the coaxial circles as a valid area; (b) control the display device to display the valid area; (c) control the display device to display the circular sections and the valid area in a rotational motion around an axis of the coaxial circles, in response to an instruction for starting a game given by a player; (d) control the display device to statically display the rotationally displayed circular sections and valid area; and (e) provide an award to the player when the display device has statically displayed predetermined symbols on a predetermined number of the circular sections within the valid area.