detect slow browsers, and override their framerate if we don't think they can handle it
slow down even more for slower browsers
early support for play-sound
fixes for play-sound
when converting a boolean toWrittenString, how about actually styling it as a boolean?
Change play-sound to match the API described at http://docs.racket-lang.org/gui/Windowing_Functions.html?q=sound#%28def._%28%28lib._mred%2Fmain..rkt%29._play-sound