diff --git a/include/scene.h b/include/scene.h
index 6218012..1a2f843 100644
--- a/include/scene.h
+++ b/include/scene.h
@@ -108,6 +108,14 @@ class Scene {
         ecs_systems_.emplace_back(hash, std::make_unique<T>(this));
     }
 
+    /* Pushes old systems starting at 'index' along by 1 */
+    template <typename T>
+    void RegisterSystemAtIndex(size_t index)
+    {
+        size_t hash = typeid(T).hash_code();
+        ecs_systems_.emplace(ecs_systems_.begin() + index, hash, std::make_unique<T>(this));
+    }
+
     template <typename T>
     T* GetSystem()
     {
diff --git a/src/scene.cpp b/src/scene.cpp
index f6a1d9b..93f5db2 100644
--- a/src/scene.cpp
+++ b/src/scene.cpp
@@ -26,11 +26,11 @@ Scene::Scene(Application* app) : app_(app) {
   RegisterComponent<UIRenderableComponent>();
 
   // Order here matters:
+  RegisterSystem<CustomBehaviourSystem>(); // potentially modifies transforms
   RegisterSystem<TransformSystem>();
-  RegisterSystem<CollisionSystem>();
-  RegisterSystem<CustomBehaviourSystem>();
-  RegisterSystem<MeshRenderSystem>();
-  RegisterSystem<UIRenderSystem>();
+  RegisterSystem<CollisionSystem>(); // depends on transformed world matrix
+  RegisterSystem<MeshRenderSystem>(); // depends on transformed world matrix
+  RegisterSystem<UIRenderSystem>(); // does nothing as of now
 }
 
 Scene::~Scene() {}
diff --git a/test/src/game.cpp b/test/src/game.cpp
index 56f70ac..4fb9e27 100644
--- a/test/src/game.cpp
+++ b/test/src/game.cpp
@@ -68,7 +68,7 @@ void PlayGame(GameSettings settings)
         //engine::Entity temple = engine::util::LoadGLTF(*start_scene, "C:/games/temple.glb", true);
 
         start_scene->RegisterComponent<CameraControllerComponent>();
-        start_scene->RegisterSystem<CameraControllerSystem>();
+        start_scene->RegisterSystemAtIndex<CameraControllerSystem>(0);
         start_scene->AddComponent<CameraControllerComponent>(camera)->noclip = true;
         start_scene->GetPosition(camera).z += 10.0f;
     }
@@ -93,7 +93,7 @@ void PlayGame(GameSettings settings)
         camera_transform->is_static = false;
 
         main_scene->RegisterComponent<CameraControllerComponent>();
-        main_scene->RegisterSystem<CameraControllerSystem>();
+        main_scene->RegisterSystemAtIndex<CameraControllerSystem>(0);
         main_scene->AddComponent<CameraControllerComponent>(camera);
 
         /* floor */