Desktop Safari Sound Timing issue (preloaded?)

In desktop safari on a mac (and probably windows too), sound is really delayed and messes up the timing of my game.

Does desktop safari have issues preloading sounds and waiting until it's loaded before starting the game?

Here's the game:

mcgraw-hill.faceyspacey.com/rocket-blast-3-v13

Safari has really bad audio support. There's not much we can do to work around it, except I recommend you use the 'Preload' actions to load sounds on startup to avoid the latency.