This time we won't go on with our Romans but we'll follow a brand new book tutorial and project: Weekend Code Project: Unity's New 2D Workflow by Jesse Freeman http://jessefreeman.com/learn-unity-2d/ to refine the introduction and the code ideas. This book and project is ideal for us because of the general "keep it simple" attitude and within it you get quickly to a working game.
Full details on Design a Game site http://designagame.eu.