nice idea...but maybe it's just me personally, i don't like small and detailed images on shirts. from far away, they tend to look distorted. and yea, the mouth looks a bit odd from far away too. tweak it more a bit i guess? and put it higher on the shirt maybe? i duno.
but i like. i went over to mexico for just a week and the smiles on the kids' faces totally struck me. not to mention this looks cool cuz its like, look at me! i'm flying! hehe =)
Not digging the filter. If you could redraw it in a vector program it would look rad. I also dislike white shirts, a more thoughtful color would probably strengthen it. Think of a color you'd associate with Mexico.
About my design