"Macros Made Easy" is a is a comprehensive guide to calculating, tracking, and adjusting food intake to achieve weight-loss. It teaches people that they can eat anything they want as long as they hit certain macronutrient (protein, carb, and fat) goals in a day.
The concept of the design is to make the cover look like a known arcade game makeover. The idea is that the guide is as easy and fun as a game. The score bar reflects "protein, carbs, fat" intake just like a game would naturally do. It depends which side the "hero" turns - towards chocolate or fruit - the count of macronutrient will reflect it accordingly. It is exactly the way people following the particular diet will need to make such "choices", according to their preferences and to reach the goal.