A few months after my original post I have finally finished the game I was working on. The shot above is an evolution of the original shot. I tried to stick to the Android Design Guidelines whilst trying to make the design look individual.
I'd love to know what you think of the design?
The game is available on the Play Store here: https://play.google.com/store/apps/details?id=uk.co.jordanterry.squaresgame