Progress report:

1) I have build the assets for 2 items: the tank, and the laser turret.
2) I can now load a tilemap from file, and build the map in the editor Tiled
3) Code for drawing vehicles is finished – along with a “team colours” shader which does a pallette replacement.
4) I have set up the state machines for the behaviour of objects
5) I have build my vehicles – which consist of a vehicle body and a turret. You put one on the map using the vehicle factory.

Here is an awesome screen shot:

Note how I can colour each tank in its team colours, Its pretty 😀