Problem with Mobile Site (URGENT HELP NEEDED)

Hello,

I am trying to figure out what the problem is with the mobile version of my website (using the Highend Theme). My website is: http://www.inbetweentheatre.org

Here is a picture of how it looks on my iPhone (attached).

What am I doing wrong? How can I easily correct this without having to re-size EVERYTHING I have just done for the desktop version?

Immediate assistance is necessary as a deadline for this site is close at hand!!

Thanks so much.