Scratch Cat will play a note on the clarinet. Listen to it. Memorize the tone. Then, he will play a random sequence of tones (all 13 tones/semi-tones in a one-octave range). Click on him when you hear the same tone again. Clicking on the wrong note ends the game. The tones speed up with every successful guess. If this is too difficult, you may prefer to only hear the 8 tones of the Major scale (no sharps or flats). If so, press "E"asy.