trynna fix click handler being garbage collected

include/app/app.h

@@ -27,8 +27,8 @@ struct Element {
   virtual Vec2<float> size(Window *window) = 0;
 
   void click() {
-    if (!mrb_nil_p(on_click.proc))
-      on_click.call();
+    printf("Running click handler\n");
+    on_click.call();
   }
 };
 
@@ -170,6 +170,7 @@ struct Scene {
   void update_scene(uint64_t delta_time) {
     if (!mrb_nil_p(update.proc)) {
       mrb_value dt_val = mrb_int_value(Ruby::mrb, delta_time);
+      printf("running: update, dt: %lu\n", delta_time);
       update.call(1, &dt_val);
     }
   }