Our OSX demo had a couple glitches:

• Gamepads / joysticks support wasn't enabled
• Music / sound files missing

Oops!  Well, I hadn't tested these myself, I just assumed they were working, as when I tested it I used the keyboard and had the volume off.  Doh!  The gamepad support was just a simple checkbox in XCode, and the sound+music files were just missing.

All fixed now!