Watoshi, I liked the first couple you posted, with the wooden backgrounds; those were a good potential match for the site. The latest two, however, look a little too blurry, particularly the second one. The sharpness could be improved, and the text could be worked on a little more, since it looks like it was just text boxes pasted onto a certain section of the screen. During the animation, the image actually shifts down to towards the right corner, too, if you look closely.

Mind you, I'm not a great GFXer myself, but I like critiquing other people's work. The majority of these entries are better than what I could produce.