The "challenge level" question is basically Sneezing Cats because that's what inspired Conical Depression. Maybe you should change that to "an extended version of one his challenge levels". I'm not trying to be rude.
Ez. You forgot these; Steel Gear, xo, Big Boned, Message to Robtop, Old Lady, Every Auto Ever, Unarmed, KrazyMan50, DansGame and most importantly Low Death.