thanks for the long review ! I'm glad you liked it :)
I really like your description the Dantesque 5th Circle of Hell punk mosh pit. (I will probably borrow it to talk about the game to my friends)
to tell you the truth there is no proper gameplay to talk about, I implemented some basic collisions and some randomisation regarding the distance of jump (which does not depend on actions of the player) and the crowd is moving completely randomly so I don't think the player can actually judge when to jump. It's just about keeping launching the performers off the stage like you descibed until getting bored ;)