afegit default per a fullscreen

source/game/options.cpp

@@ -189,7 +189,7 @@ void init() {
     // Window
     window.width = Defaults::Window::WIDTH;
     window.height = Defaults::Window::HEIGHT;
-    window.fullscreen = false;
+    window.fullscreen = Defaults::Window::FULLSCREEN;
     window.zoom_factor = Defaults::Window::BASE_ZOOM;
 
     // Physics