diff --git a/Runtime/SkyHookManager.cs b/Runtime/SkyHookManager.cs
index 99aa05d..c23304b 100644
--- a/Runtime/SkyHookManager.cs
+++ b/Runtime/SkyHookManager.cs
@@ -3,87 +3,105 @@ using UnityEngine.Events;
 
 namespace SkyHook
 {
-  public class SkyHookManager : MonoBehaviour
-  {
-    private static SkyHookManager _instance;
-
-    internal static bool IsFocused;
-
-    public bool requireFocus = true;
-
-    private bool _started;
-
-    public static UnityEvent<SkyHookEvent> KeyUpdated = new();
-
-    public static SkyHookManager Instance
+    public class SkyHookManager : MonoBehaviour
     {
-      get
-      {
-        if (_instance) return _instance;
+        private static SkyHookManager _instance;
 
-        var obj = new GameObject("SkyHook Manager");
+        private static bool IsFocused;
 
-        _instance = obj.AddComponent<SkyHookManager>();
+        /// <summary>
+        /// Whether or not the event will be received only if the game window is focused.
+        /// </summary>
+        // ReSharper disable once MemberCanBePrivate.Global
+        // ReSharper disable once FieldCanBeMadeReadOnly.Global
+        public static bool RequireFocus = true;
 
-        DontDestroyOnLoad(_instance);
+        private bool _started;
 
-        return _instance;
-      }
+        /// <summary>
+        /// The key updated event data
+        /// </summary>
+        // ReSharper disable once MemberCanBePrivate.Global
+        public static readonly UnityEvent<SkyHookEvent> KeyUpdated = new();
+
+        /// <summary>
+        /// The instance of sky hook manager. The instance will be crated if it does not exist
+        /// </summary>
+        // ReSharper disable once MemberCanBePrivate.Global
+        public static SkyHookManager Instance
+        {
+            get
+            {
+                if (_instance) return _instance;
+
+                var obj = new GameObject("SkyHook Manager");
+
+                _instance = obj.AddComponent<SkyHookManager>();
+
+                DontDestroyOnLoad(_instance);
+
+                return _instance;
+            }
+        }
+
+        private void HookCallback(SkyHookEvent ev)
+        {
+            if (RequireFocus && !IsFocused)
+            {
+                return;
+            }
+
+            KeyUpdated.Invoke(ev);
+        }
+
+        private void StartHook()
+        {
+            var result = SkyHookNative.StartHook(HookCallback);
+
+            if (result != null)
+            {
+                throw new SkyHookException(result);
+            }
+
+            _started = true;
+        }
+
+        private void StopHook()
+        {
+            if (!_started) return;
+
+            var result = SkyHookNative.StopHook();
+
+            if (result != null)
+            {
+                throw new SkyHookException(result);
+            }
+
+            _started = false;
+        }
+
+        public static void Start()
+        {
+            Instance.StartHook();
+        }
+
+        public static void Stop()
+        {
+            Instance.StopHook();
+        }
+
+        private void OnDestroy()
+        {
+            Debug.Log("Destroy");
+            StopHook();
+        }
+
+        private void Run()
+        {
+            if (requireFocus)
+            {
+                IsFocused = Application.isFocused;
+            }
+        }
     }
-
-    private void HookCallback(SkyHookEvent ev)
-    {
-      KeyUpdated.Invoke(ev);
-    }
-
-    private void StartHook()
-    {
-      var result = SkyHookNative.StartHook(HookCallback);
-
-      if (result != null)
-      {
-        throw new SkyHookException(result);
-      }
-
-      _started = true;
-    }
-
-    private void StopHook()
-    {
-      if (!_started) return;
-
-      var result = SkyHookNative.StopHook();
-
-      if (result != null)
-      {
-        throw new SkyHookException(result);
-      }
-
-      _started = false;
-    }
-
-    public static void Start()
-    {
-      Instance.StartHook();
-    }
-
-    public static void Stop()
-    {
-      Instance.StopHook();
-    }
-
-    private void OnDestroy()
-    {
-      Debug.Log("Destroy");
-      StopHook();
-    }
-
-    private void Run()
-    {
-      if (requireFocus)
-      {
-        IsFocused = Application.isFocused;
-      }
-    }
-  }
 }
\ No newline at end of file