diff --git a/bakara/src/bakara.h b/bakara/src/bakara.h
index 74662fb..7574eb2 100644
--- a/bakara/src/bakara.h
+++ b/bakara/src/bakara.h
@@ -3,10 +3,12 @@
 #include <bakara/math/type.h>
 #include <bakara/core/log.h>
 #include <bakara/core/application.h>
+#include <bakara/core/base.h>
+#include <bakara/core/io_codes.h>
 #include <bakara/events/event.h>
 #include <bakara/events/key_event.h>
+#include <bakara/events/mouse_event.h>
 #include <bakara/events/window_event.h>
 #include <bakara/events/app_event.h>
-#include <bakara/core/io_codes.h>
 
 #include <bakara/core/entry.h>
\ No newline at end of file
diff --git a/sandbox/src/sandbox.cpp b/sandbox/src/sandbox.cpp
index fc62e8f..1aa15b3 100644
--- a/sandbox/src/sandbox.cpp
+++ b/sandbox/src/sandbox.cpp
@@ -10,7 +10,9 @@ class Sandbox : public Bk::Application
         {
             auto event = Bk::WindowResizeEvent(120, 120);
             auto key_event = Bk::KeyPressEvent(Bk::Key::A);
-            std::cout << event.to_string() << "\n" << key_event.to_string() << "\n";
+            auto mouse_event = Bk::MouseMoveEvent(2.3f, 1.2f);
+            std::cout << event.to_string() << "\n" << key_event.to_string() << "\n" << mouse_event.get_pos().x << "\n";
+            BK_CORE_IMP_ASSERT(false, "Big Error")
         }
 
         ~Sandbox()