diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6422ef6..19fc38b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -198,7 +198,7 @@ add_executable(My3D
         lib/xmlparser/src/xmlparser.c
         lib/xmlparser/src/xmlproperties.c
         src/game_loader.c
-        main.c)
+        main.c lib/gamacon/include/errors.h lib/gamacon/src/ui/button.c lib/gamacon/src/ui/setup_ui.c lib/gamacon/include/ui.h src/interface.c lib/gamacon/src/components/clickable_component.c lib/gamacon/include/components/clickable_component.h lib/gamacon/src/systems/clickable_system.c)
 
 add_compile_options(-W -Wall -Wextra -Wshadow)
 
diff --git a/Makefile b/Makefile
index bf65782..8976365 100644
--- a/Makefile
+++ b/Makefile
@@ -23,7 +23,7 @@ CC = gcc
 
 all: build
 
-build: $(OBJ)
+$(NAME): $(OBJ)
 	$(MAKE) -C lib/gamacon
 	$(MAKE) -C lib/my
 	$(MAKE) -C lib/xmlparser
diff --git a/prefabs/game.gcprefab b/prefabs/game.gcprefab
index 20a1235..c58b3a1 100644
--- a/prefabs/game.gcprefab
+++ b/prefabs/game.gcprefab
@@ -1,9 +1,11 @@
 <gc_scene>
     <data>
         <sprite src="assets/sprites/grass.png" />
+        <sprite name="button_background" src="assets/sprites/grass.png" />
         <font src="assets/fonts/roboto.ttf" />
     </data>
     <gc_entities>
+    	<button text="Lorem ipsum." x="75%" y="25%" click="test" />
         <gc_entity>
             <transform_component />
             <renderer text="assets/sprites/grass.png" />
diff --git a/src/game_loader.c b/src/game_loader.c
index 28d50a0..2a04858 100644
--- a/src/game_loader.c
+++ b/src/game_loader.c
@@ -12,12 +12,16 @@
 #include <SFML/System.h>
 #include <SFML/Window.h>
 
+void test(gc_engine *engine, int entity_id);
+
 int register_customcmps(gc_engine *engine)
 {
     engine->finish_physics(engine);
+	engine->add_callback(engine, "test", &test);
     return (0);
 }
 
+
 int create_game_scene(gc_engine *engine, const char *map)
 {
     gc_scene *scene;
diff --git a/src/interface.c b/src/interface.c
new file mode 100644
index 0000000..8a0f9d4
--- /dev/null
+++ b/src/interface.c
@@ -0,0 +1,10 @@
+//
+// Created by anonymus-raccoon on 2/24/20.
+//
+
+#include "engine.h"
+
+void test(gc_engine *engine, int entity_id)
+{
+	printf("Test called.\n");
+}
\ No newline at end of file