Finally something to look at! Box2D is up and running. I have two cameras, one for the game and one for the overlay. both scale correctly so that any screen size gets a large circle in the center. Currently 200m across. The ground, ball and bullet are just tests for the interactions that I'll need. Currently the source code is one big class.
Next up: basic gameplay, deploy to phones and then an editor so my designer can make levels and come up with ideas for any power ups and controls. Also, actual gameplay will help determine the scale of objects that work on a phone, which leads to the assets.