* EXCEPTION:
* ERROR - :[] method missing on ~Class~.

#+begin_src ~Class#inspect~
NIL
#+end_src ~Class#inspect~



The method named
  :[]
with args
  ["pxWid"]
doesn't exist on [NilClass].

(suggestions above)
** Backtrace:
*** app/main.rb:10:in initialize
*** app/main.rb:752:in build_world
*** app/main.rb:1001:in tick