As far as the Quil window with graphics, I'm not sure if it's because an Applet is being used, but on Mac OS X, the window pops up for me behind my other windows and without focus. I have to hide all of the other windows on top of it to find it. It's weird, I know.

What is the command you're running that gives you the error "quil.Applet cannot be cast to clojure.lang.IFn" ?