diff --git a/source/engine/mrbffi.c b/source/engine/mrbffi.c
index 2a68b22..2ed29a5 100644
--- a/source/engine/mrbffi.c
+++ b/source/engine/mrbffi.c
@@ -486,6 +486,64 @@ s7_pointer s7_anim_cmd(s7_scheme *sc, s7_pointer args) {
     return args;
 }
 
+s7_pointer s7_make_gameobject(s7_scheme *sc, s7_pointer args) {
+    int g = MakeGameobject();
+    struct gameobject *go = get_gameobject_from_id(g);
+
+    go->scale = s7_real(s7_car(args));
+    go->bodytype = s7_integer(s7_cadr(args));
+    go->mass = s7_real(s7_caddr(args));
+    go->f = s7_real(s7_cadddr(args));
+    go->e = s7_real(s7_list_ref(sc, args, 4));
+
+    return s7_make_integer(sc, g);
+}
+
+s7_pointer s7_make_sprite(s7_scheme *sc, s7_pointer args) {
+    int go = s7_integer(s7_car(args));
+    const char *path = s7_string(s7_cadr(args));
+    cpVect pos = s7tovec2(sc, s7_caddr(args));
+
+    YughInfo("Using gameid %d.", go);
+
+    struct sprite *sp = make_sprite(get_gameobject_from_id(go));
+
+    sprite_loadtex(sp, path);
+    sp->pos[0] = pos.x;
+    sp->pos[1] = pos.y;
+
+    return args;
+}
+
+s7_pointer s7_make_box2d(s7_scheme *sc, s7_pointer args) {
+    int go = s7_integer(s7_car(args));
+    cpVect size = s7tovec2(sc, s7_cadr(args));
+    cpVect offset = s7tovec2(sc, s7_caddr(args));
+
+    struct phys2d_box *box = Make2DBox(get_gameobject_from_id(go));
+    box->w = size.x;
+    box->h = size.y;
+    box->offset[0] = offset.x;
+    box->offset[1] = offset.y;
+
+    phys2d_boxinit(box, get_gameobject_from_id(go));
+
+    return args;
+}
+
+s7_pointer s7_make_circ2d(s7_scheme *sc, s7_pointer args) {
+    int go = s7_integer(s7_car(args));
+    double radius = s7_real(s7_cadr(args));
+    cpVect offset = s7tovec2(sc, s7_caddr(args));
+
+    struct phys2d_circle *circle = Make2DCircle(get_gameobject_from_id(go));
+    circle->radius = radius;
+    circle->offset[0] = offset.x;
+    circle->offset[1] = offset.y;
+
+    phys2d_applycircle(circle);
+}
+
 #define S7_FUNC(NAME, ARGS) s7_define_function(s7, #NAME, s7_ ##NAME, ARGS, 0, 0, "")
 
 void ffi_load() {
@@ -526,5 +584,10 @@ void ffi_load() {
 
     S7_FUNC(anim, 2);
     S7_FUNC(anim_cmd, 3);
+
+    S7_FUNC(make_gameobject, 5);
+    S7_FUNC(make_sprite, 3);
+    S7_FUNC(make_box2d, 3);
+    S7_FUNC(make_circ2d, 3);
 }
 
diff --git a/source/engine/registry.c b/source/engine/registry.c
index cb36e08..a1ea3ec 100644
--- a/source/engine/registry.c
+++ b/source/engine/registry.c
@@ -74,3 +74,7 @@ void comp_draw_debug(struct component *c) {
 void comp_draw_gui(struct component *c) {
     c->draw_gui(c->data);
 }
+
+void c_draw_debug(struct compref *c) {
+    c->ref->draw_debug(c->data);
+}
\ No newline at end of file
diff --git a/source/engine/registry.h b/source/engine/registry.h
index b2257dc..3813399 100644
--- a/source/engine/registry.h
+++ b/source/engine/registry.h
@@ -8,6 +8,11 @@
 
 struct gameobject;
 
+struct compref {
+    void *data;
+    struct component *ref;
+};
+
 struct component {
     const char *name;
     void *(*make)(struct gameobject * go);		/* Called to create the component */
diff --git a/source/engine/yugine.c b/source/engine/yugine.c
index 33e6ed6..2622fad 100644
--- a/source/engine/yugine.c
+++ b/source/engine/yugine.c
@@ -156,13 +156,8 @@ int main(int argc, char **args) {
     JSON_Object *ro = json_value_get_object(rv);
     json_object_set_string(ro, "name", "yugine");
     json_object_set_number(ro, "age", 30);
-    char *serialized = json_serialize_to_string_pretty(rv);
-
-    FILE *json = fopen("test.json", "w");
-    fputs(serialized, json);
-    json_free_serialized_string(serialized);
+    char *serialized = json_serialize_to_file(rv, "test2.json");
     json_value_free(rv);
-    fclose(json);
 
 
     const GLFWvidmode *vidmode = glfwGetVideoMode(glfwGetPrimaryMonitor());