Threaded ticks

TODO make movable objects use velocity so rendering still looks smooth when things move

include/Game/scene/Loading.h

@@ -11,7 +11,6 @@ public:
     explicit LoadingScreen(const std::string& name) : Scene(name) {}
 
     void Init() final;
-    void Update() final;
-    void Render(JGL::RenderTarget* render_target =  nullptr) final;
+    void Render() final;
     ~LoadingScreen() final;
 };