Tutorial Sketch Broken

[jsawesome1]

After running the tutorial sketch, it opened blank windows until my computer froze (On a related note how do I kill something like this quickly?). The windows had two different titles, "Sketch", and "SDL2 Window". I'm not sure if this is relevant, but I installed cl-sdl2 manually from git, because the quicklisp version didn't have the sdl2-ffi:sdl-point.

[jsawesome1]

Sorry, I misread the documentation. I had this:
(defsketch tutorial () (make-instance 'tutorial))
Instead of this:
(defsketch tutorial ()) (make-instance 'tutorial)