I don't thinks it needs music, but sound.... I looked at the live site. Sound it great! and it has an off button! much better. The text buttons should be clickable (don't make the user think to much). the Hitstate on the gallery has a glitch that was pretty freaky. Mostlikly because the robot moves, moving the hitstate. team button did not work. The project kinda hijacked my browswer (firefox 3.6.13) I could not click on another tab until I closed your site. Good way to piss off traffic.
I love the design, I really like the rough sketched icons on each subpage. I worry though if it will fit whatever you fill the content with... Its a great design!