According to Wikipedia:

Quote:
The human condition encompasses the unique features of being human.
It can be described as the unalterable part of humanity that is inherent and innate to human beings and not dependent on factors such as gender, race or class. It includes concerns such as the meaning of life, the search for gratification, the sense of curiosity, the inevitability of isolation, or awareness regarding the inescapability of death.


I think the piano represents that last one well, what with its crushing of heads as a cartoon gag. Also, who hasn't been strangled with piano wire?

But of course the game was Guitar Hero, not Piano Hero.