Use keyboard: A-L and W-P keys (lower octave), Q-P (upper octave)
Click keys or use your computer keyboard to play.
Lower octave: A S D F G H J K L ; ' (white keys), W E T Y U O P (black keys)
Upper octave: Q 2 3 5 6 7 9 0 [ ] (white keys), black keys with Ctrl modifier