But how these elements respond is just as important as how they look. For example I hope the six main buttons give a nice depressed feel when touched, and not a crappy blue highlight.
Two things I feel are problems -
1) The settings icon at the top-right is too much towards being part of the surrounding image and not enough of a touch-target.
2) Both bump images suggest that you just hold the phones next to each other and they wirelessly communicate. There's no feeling of the movement or motion needed to start that process.