When I tried to use the storylinez site, it was taking a long time, around 1-6 seconds to completely respond to each hover. So it's hard for me to give more intelligent feedback than "it needs to be faster".
Especially with such a hover-centric navigation model, if reaction is not quick, users will have a hard time figuring out how to make things happen. I was reduced to hovering over random UI elements to see if anything happened.
I would recommend you take some of your non techy friends, sit them down at a computer, tell them "Hey, why don't you find some funny videos or something cool using this storylinez site", and see what they say.
