A plurality of pads SN to CY2 each of which is assigned a tone color of a different musical instrument, and has a surface which a player strikes are provided. Furthermore, a controller CT having a CPU 18a for identifying a pad included in the pads SN to CY2 and struck by the player is also provided. The controller CT has a tone generator 16 for generating musical tones of a musical instrument assigned to the identified pad. The CPU 18a evaluates the player's performance and scores the performance. More specifically, the CPU 18a awards an amount of points when the first and the second pads which are included in the pads SN to CY2 but are different with each other are struck in a sequence. Furthermore, a display unit 15 for displaying the awarded score is also provided.