Problem with lagging & publishing

[logand]

How can I reduce the lagging that goes on in my site? I have a preloader and the fps is set to 30, but still it is very very choppy and its frustrating me quite a bit to put it in nicest terms. Another problem that I'm having is with publishing. It looks fine in IE, but in FF its very very small. I published my at 50% x 100% but for some reason FF doesn't seem to want to comply with those settings? Any and all help is greatly appreciated.
Here's the site to give you a feel for what I'm talking about:LINK (http://www.bravoarmada.com/hangingman.html)

Thanks,
Logan