text: /**
   * CG Space Invaders
   * CG45179 16'17
   *
   * @author: Rui Ventura ( ist181045 )
   * @author: Diogo Freitas ( ist181586 )
   * @author: Sara Azinhal ( ist181700 )
   */
  
  export const WIDTH  = 800;
  export const HEIGHT = 600;
  
  export const WINDOW_PIXEL_RATIO = window.devicePixelRatio;
  
  export const WINDOW_WIDTH  = () => window.innerWidth;
  export const WINDOW_HEIGHT = () => window.innerHeight;
  