not done by me but.....lord much bot

 

Maybe it's possible without a bot if like 70 people each played 1 key each

 

or some crazy person that had like 100 cups of coffee 50 monsters 30 kick starts and 20 rock stars.

 

'Death waltz' (it's one the nickname given to the first one) is from Touhou project, it's possible if you change to closer octaves but it's still VERY hard to play.

 

oh and add a heart attack to that list