It looks very accurate to me, especially the shade of the colors. You have just the right shades of blue and red.

An example of a real 28s here:

http://yoyoexpert.com/forums/index.php/topic,75764.0.html

Are you going to try some other ones too? I think hulk smash would look good as a screen saver, but something like a bip bop might be a little too busy. Some people like busy though. It would be interesting to see what others you come up with. I did a few screensavers, but it was just an extreme yo-yo close-up of the cup.