Light at the end of the tutorial.

While I was cleaning up the code I decided to add a fade-to-white transition between stages. It only seems to show up in Firefox but does not break others. IE9, IE10 (when the *ick* Consumer Preview actually works in my VirtualBox and doesn't freak out as it's been doing up to now) and Opera seem to optimize away the forceRedraws involved)

Next I want to try to add game events to the document or its documentElement instead of having to use my own cobbled-together system for user-defined events. If I can do that, maybe I can use those to get every browser to transition correctly.