"The Holophone: This instrument is not real. This instrument is merely a holograph of an instrument. This instrument changes shape, appearance and sound as you play. This instrument is impossible to play. However, you can play it."
Absolutely brilliant, just like the rest. This game rules.
Great question! Sorry for the late reply! Yes, I wanted to save myself a little space for if/when I return to polish this little game up, in case playtesters had feedback that required some changes or additions!