diff --git a/sources/main.cpp b/sources/main.cpp
index 8a86548..e0a5a9e 100644
--- a/sources/main.cpp
+++ b/sources/main.cpp
@@ -9,17 +9,31 @@ using namespace e2d;
 
 namespace
 {
-    class game final : public application {
+    class game_system final : public ecs::system {
     public:
-        bool frame_tick() final {
+        void process(ecs::registry& owner) override {
+            E2D_UNUSED(owner);
             const keyboard& k = the<input>().keyboard();
-            while ( the<window>().should_close() || k.is_key_just_released(keyboard_key::escape) ) {
-                return false;
+            if ( k.is_key_just_released(keyboard_key::f12) ) {
+                the<dbgui>().toggle_visible(!the<dbgui>().visible());
             }
-            the<render>().execute(render::command_block<64>()
-                .add_command(render::clear_command()
-                    .color_value({1.f, 0.4f, 0.f, 1.f}))
-                .add_command(render::swap_command(true)));
+            if ( k.is_key_just_released(keyboard_key::escape) ) {
+                the<window>().set_should_close(true);
+            }
+        }
+    };
+
+    class game final : public high_application {
+    public:
+        bool initialize() final{
+            ecs::registry_filler(the<world>().registry())
+                .system<game_system>(world::priority_update);
+
+            ecs::entity camera_e = the<world>().registry().create_entity();
+            ecs::entity_filler(camera_e)
+                .component<camera>(camera()
+                    .background({1.f, 0.4f, 0.f, 1.f}))
+                .component<actor>(node::create(camera_e));
             return true;
         }
     };
@@ -31,5 +45,6 @@ int e2d_main(int argc, char *argv[]) {
             .timer_params(engine::timer_parameters()
                 .maximal_framerate(100)));
     modules::initialize<starter>(argc, argv, params).start<game>();
+    modules::shutdown<starter>();
     return 0;
 }