waw, really strange: I had about the same idea but also with a backside where you saw the worm entering.
So I must like this idea since it is a bit mine as well, but it lacks quality in drawing (that's the reason why mine wasn't up yet: I couldn't get it right) so I'll score you a 3
The image looks "rough round the edges" because you created it the wrong size. The html embedding it in the page is distorting it, you need to stick to the template (at the given size) provided. Also, I suspect it's a transparent gif with white matting. This is showing the red background in the page beneath the image. That's what's causing the white fringe. That's 2 reasons it looks a bit ropey!
(If you save the image to your comp and view it out of the page it looks loads better)
hehe..tits586's comment "precious" makes me think of Lord of the Rings, and that make me think of ring worms...mmm
Cute shirt, but yeah, make it cleaner. I wonder if it'd work better with the text you use for the shirt's title "I have worms" cuz it was funnier after I read the title. (hrm..but then you might have to add a few more worms :))
About my design