Styled the admin button and added the button for come back to the game

src/components/Admin/Header/AdminHeader.jsx

@@ -1,11 +1,18 @@
 import React from 'react'
+import {withRouter} from 'react-router'
 
-const AdminHeader = () => {
+const AdminHeader = (props) => {
     return (
         <header>
             <h1>Admin Place</h1>
+            <button
+                className="redirect-button"
+                onClick={() => props.history.push('/')}    
+            >
+                Back to the Game
+            </button>
         </header>
     )
 }
 
-export default AdminHeader
+export default withRouter(AdminHeader)