True, those don't give a lot of info about the novel, but at the same time I don't remember too many happy-go-lucky space high-fives happening either.
So that begs the questions - are there any great covers?
http://www.tor.com/blogs/2010/04/enders-game-ebook-cover-by-sam-weber
The ebook cover for Ender's Game is pretty nice though, haha. The other initial sketches would've made good covers too.