A gaming machine and method having a high-low game including a plurality of ranked symbols. A control device controls air-conditioning of a room having installed therein a plurality of pieces of equipment each being capable of drawing outside air to thereby cool down an interior of the equipment. The double-arm levers together with the troughs form a system of hinged parallelograms, providing uniform distribution of pulsations along the whole capacity of the upper trough that produces conditions for the intensification of the jigging process.