Añadidos colores al fondo

units/screen.cpp

@@ -29,6 +29,7 @@ Screen::Screen(SDL_Window *window, SDL_Renderer *renderer, options_t *options)
             std::cout << "TitleSurface could not be created!\nSDL Error: " << SDL_GetError() << std::endl;
         }
     }
+	SDL_SetTextureBlendMode(gameCanvas, SDL_BLENDMODE_BLEND);
 
     // Establece el modo de video
     setVideoMode(options->screen.mode);