Abstract: A foot switcher includes: a foot switch sheet having a plurality of pressure switches for detecting steps; and a mat placed under the foot switch sheet, and including a mat body having a plurality of divisions, one division being different from another division in hardness, and a specified number of divisions corresponding to the plurality of pressure switches, respectively. The hardness of one division is different from that of another division adjoining the one division. A top layer for covering the plurality of the pressure switches is formed with slip preventer.

Abstract: A flat foot switch unit has a surface has a slippage-preventing measure. In this, a foot switch section has a four-sided surface shape and step-motion-detectable foot switches internally formed in nine regions by dividing the surface shape in 3×3. Furthermore, the foot switch section has slippage-preventing linear grooves at least in the regions on the surface of the top layer of a first sheet unit, which is part of the surface shape, and in which the foot switches are arranged.

Abstract: Sound generation control and instruction operation evaluation is performed by sound group selection and a sound generation instruction, with a mimic guitar having selection buttons for selecting one of a plurality of sound groups bearing a series of sounds, and a picking blade for instructing the generation of a sound. The rhythm-matching game can be enjoyed relatively easily in a manner closer to a realistic state of playing an instrument.