diff --git a/Assets/Plugin/WindowsInput.dll b/Assets/Plugin/WindowsInput.dll
new file mode 100644
index 0000000..cc45349
Binary files /dev/null and b/Assets/Plugin/WindowsInput.dll differ
diff --git a/Assets/Script/PanelButton.cs b/Assets/Script/PanelButton.cs
index dab905e..8d4126b 100644
--- a/Assets/Script/PanelButton.cs
+++ b/Assets/Script/PanelButton.cs
@@ -21,7 +21,7 @@ public class PanelButton : MonoBehaviour
     private Renderer cr;
     public GameObject camera;
     private AudioSource audioSrc;
-    public static AudioClip btnSound;
+    private static AudioClip btnSound;
 
     void Start()
     {