First commit

Assets/Code/Util/Editor/SceneReferenceEditor.cs

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+using UnityEditor;
+using UnityEngine;
+
+namespace Nox.Core
+{
+    [CustomEditor(typeof(SceneReference))]
+    public class SceneReferenceEditor : Editor {
+        private SceneReference sceneReference;
+
+        private SerializedProperty gameState;
+        private SerializedProperty playMode;
+
+        private void OnEnable() {
+            sceneReference = (SceneReference)target;
+            playMode = serializedObject.FindProperty("playMode");
+            gameState = serializedObject.FindProperty("gameState");
+        }
+
+        public override void OnInspectorGUI() {
+            EditorGUILayout.PropertyField(gameState, new GUIContent("Game Active State"));
+            if(sceneReference.gameState == GameState.GameMode) {
+                EditorGUILayout.PropertyField(playMode, new GUIContent("Play Mode"));
+            }
+
+            serializedObject.ApplyModifiedProperties();
+        }
+    }
+}