diff --git a/packages/webgl/upm/Runtime/Plugins/WebGL/puerts.jslib b/packages/webgl/upm/Runtime/Plugins/WebGL/puerts.jslib
index 54cb217..79970c4 100644
--- a/packages/webgl/upm/Runtime/Plugins/WebGL/puerts.jslib
+++ b/packages/webgl/upm/Runtime/Plugins/WebGL/puerts.jslib
@@ -1,44 +1,4 @@
-var exportDLL = {
-    InitPuertsWebGL: function () {
-        var global = typeof global != 'undefined' ? global : window;
-        if (!global.PuertsWebGL) {
-            throw new Error('cannot found PuertsWebGL script. please find some way to load puerts-runtime.js');
-        }
-        let oldUpdateGlobalBufferAndViews = updateGlobalBufferAndViews;
-        updateGlobalBufferAndViews = function (buf) {
-            oldUpdateGlobalBufferAndViews(buf);
-            global.PuertsWebGL.updateGlobalBufferAndViews(
-                HEAP8,
-                HEAPU8,
-                HEAP32,
-                HEAPF32,
-                HEAPF64
-            );
-        }
-        global.PuertsWebGL.Init({
-            UTF8ToString,
-            _malloc,
-            _free,
-            _setTempRet0,
-            stringToUTF8,
-            lengthBytesUTF8,
-            stackAlloc,
-            stackSave,
-            stackRestore,
-            _CallCSharpFunctionCallback: Module._CallCSharpFunctionCallback,
-            _CallCSharpConstructorCallback: Module._CallCSharpConstructorCallback,
-            _CallCSharpDestructorCallback: Module._CallCSharpDestructorCallback,
-            
-            HEAP8,
-            HEAPU8,
-            HEAP32,
-            HEAPF32,
-            HEAPF64,
-        });
-        global.PuertsWebGL.inited = true;
-    },
-};
-
+var exportDLL = {};
 
 [
     "GetLibVersion",
@@ -132,14 +92,56 @@ var exportDLL = {
     "LogicTick",
     "SetLogCallback",
 ].forEach(function (methodName) {
-
     exportDLL[methodName] = new Function(
         "var global = typeof global != 'undefined' ? global : window; " +
         "if (!global.PuertsWebGL) throw new Error('cannot found PuertsWebGL script. please find some way to load puerts-runtime.js');" +
-        "if (!global.PuertsWebGL.inited) throw new Error('please use Puerts.WebGL.MainEnv.Get() to create JsEnv'); " +
         "if (global.PuertsWebGL.debug) console.log('WebGL DLL:" + methodName + "'); "+
         "return global.PuertsWebGL['" + methodName + "'].apply(this, arguments)"
     );
 })
 
-mergeInto(LibraryManager.library, exportDLL);
\ No newline at end of file
+mergeInto(LibraryManager.library, exportDLL);
+
+mergeInto(LibraryManager.library, {
+  GetApiLevel__postset: `
+  addOnInit(function () {
+    var global = typeof global != "undefined" ? global : window;
+    if (!global.PuertsWebGL) {
+      throw new Error(
+        "cannot found PuertsWebGL script. please find some way to load puerts-runtime.js"
+      );
+    }
+    let oldUpdateGlobalBufferAndViews = updateGlobalBufferAndViews;
+    updateGlobalBufferAndViews = function (buf) {
+      oldUpdateGlobalBufferAndViews(buf);
+      global.PuertsWebGL.updateGlobalBufferAndViews(
+        HEAP8,
+        HEAPU8,
+        HEAP32,
+        HEAPF32,
+        HEAPF64
+      );
+    };
+    global.PuertsWebGL.Init({
+      UTF8ToString,
+      _malloc,
+      _free,
+      _setTempRet0,
+      stringToUTF8,
+      lengthBytesUTF8,
+      stackAlloc,
+      stackSave,
+      stackRestore,
+      _CallCSharpFunctionCallback: Module._CallCSharpFunctionCallback,
+      _CallCSharpConstructorCallback: Module._CallCSharpConstructorCallback,
+      _CallCSharpDestructorCallback: Module._CallCSharpDestructorCallback,
+
+      HEAP8,
+      HEAPU8,
+      HEAP32,
+      HEAPF32,
+      HEAPF64,
+    });
+    global.PuertsWebGL.inited = true;
+  });`,
+});
\ No newline at end of file
diff --git a/packages/webgl/upm/Runtime/WebGL.cs b/packages/webgl/upm/Runtime/WebGL.cs
deleted file mode 100644
index 1aefca5..0000000
--- a/packages/webgl/upm/Runtime/WebGL.cs
+++ /dev/null
@@ -1,42 +0,0 @@
-using System;
-using System.Runtime.InteropServices;
-using System.Collections.Generic;
-
-namespace Puerts
-{
-    namespace WebGL
-    {
-        public class MainEnv
-        {
-            private static JsEnv jsEnvInstance;
-
-            public static JsEnv Get()
-            {
-                if (jsEnvInstance != null) 
-                {
-                    return jsEnvInstance;
-                }
-                return Get(new Puerts.DefaultLoader());
-            }
-            
-            public static JsEnv Get(Puerts.ILoader loader, int debugPort = -1)
-            {
-                if (jsEnvInstance != null) 
-                {
-                    return jsEnvInstance;
-                }
-
-#if !UNITY_EDITOR && UNITY_WEBGL
-                InitPuertsWebGL();
-#endif
-                jsEnvInstance = new JsEnv(loader, debugPort);
-                return jsEnvInstance;
-            }
-
-#if !UNITY_EDITOR && UNITY_WEBGL
-            [DllImport("__Internal", CallingConvention = CallingConvention.Cdecl)]
-            private static extern IntPtr InitPuertsWebGL();
-#endif
-        }
-    }
-}
\ No newline at end of file
diff --git a/packages/webgl/upm/Runtime/WebGL.cs.meta b/packages/webgl/upm/Runtime/WebGL.cs.meta
deleted file mode 100644
index a50c038..0000000
--- a/packages/webgl/upm/Runtime/WebGL.cs.meta
+++ /dev/null
@@ -1,11 +0,0 @@
-fileFormatVersion: 2
-guid: 548962931a9de85429eb6f5f694e710e
-MonoImporter:
-  externalObjects: {}
-  serializedVersion: 2
-  defaultReferences: []
-  executionOrder: 0
-  icon: {instanceID: 0}
-  userData: 
-  assetBundleName: 
-  assetBundleVariant: 
diff --git a/projects/8_UnitTest/Assets/Test/PuertsTest.cs b/projects/8_UnitTest/Assets/Test/PuertsTest.cs
index 5e4f753..c703514 100644
--- a/projects/8_UnitTest/Assets/Test/PuertsTest.cs
+++ b/projects/8_UnitTest/Assets/Test/PuertsTest.cs
@@ -206,7 +206,7 @@ void Awake()
 
         void Start()
         {
-            var jsEnv = Puerts.WebGL.MainEnv.Get(new TSLoader());
+            var jsEnv = new JsEnv(new TSLoader());
 
             // var jsEnv = new Puerts.JsEnv(new DefaultLoader(), 8080);
             // jsEnv.WaitDebugger();