fix：1、更换关卡获取，改为单关一个json文件

Assets/Scenes/MainScene.unity

@@ -963,6 +963,50 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: c677bf10dae182441b932bf59cb07226, type: 3}
   m_Name: 
   m_EditorClassIdentifier: 
+--- !u!1 &1356900049
+GameObject:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  serializedVersion: 6
+  m_Component:
+  - component: {fileID: 1356900051}
+  - component: {fileID: 1356900050}
+  m_Layer: 0
+  m_Name: LevelManager
+  m_TagString: Untagged
+  m_Icon: {fileID: 0}
+  m_NavMeshLayer: 0
+  m_StaticEditorFlags: 0
+  m_IsActive: 1
+--- !u!114 &1356900050
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 1356900049}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: 5320c583a06f41b59b53d7da4e36c131, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: 
+--- !u!4 &1356900051
+Transform:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 1356900049}
+  serializedVersion: 2
+  m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
+  m_LocalPosition: {x: 0, y: 0, z: 0}
+  m_LocalScale: {x: 1, y: 1, z: 1}
+  m_ConstrainProportionsScale: 0
+  m_Children: []
+  m_Father: {fileID: 0}
+  m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
 --- !u!1 &1361344198
 GameObject:
   m_ObjectHideFlags: 0
@@ -1219,3 +1263,4 @@ SceneRoots:
   - {fileID: 1183762477}
   - {fileID: 2110239013}
   - {fileID: 1361344199}
+  - {fileID: 1356900051}