They're not bad, really. I don't know that I'd go for the colored background that you have now, and I think that the immediate background art surrounding the courts is a little busy, to the point that it detracts from the characters depicted therein. But those are my opinions - it's not a bad design at all, overall. My only true suggestion would be to make the indices a little more clear in terms of choice of font - I know there's a temptation to use a font that looks vaguely like Chinese characters, but please, resist.