fix: forgot pushing ...

include/render/gui/TowerGui.h

@@ -25,6 +25,7 @@ namespace gui {
 class MainMenu;
 class GameMenu;
 class FrameMenu;
+class UpdateMenu;
     
 } // namespace gui
 
@@ -43,7 +44,7 @@ private:
     std::unique_ptr<td::gui::FrameMenu> m_FrameMenu;
     std::unique_ptr<td::gui::UpdateMenu> m_UpdateMenu;
 
-    bool m_DemoOpened = false;
+    bool m_DemoOpened = true;
 public:
     TowerGui(SDL_Window* wndow, SDL_GLContext glContext, td::render::Renderer* renderer);
     ~TowerGui();