I scored 12 when i tried this, and my friends has always said that my screen has weard colors... i shoould try this with a better screen
I don't think 12 is bad at all, anyway. Plus, if you had distorted color vision, may be that'd be an artistic benefit
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Also, it's really near impossible to do this test on a tablet PC with no mouse/touchpad, seems the dragging on the page is near impossible with a stylus with Android but I can tell the colors by simply eyeing them up. Is your screen warm or cool? Seems cooler displays are better for a range of color, but warm is nicer on the eyes for like gaming or watching cinematic films, I suppose because all the colors blend together better (hence it's harder to determine their differences).