text: 
  // Get the url of the desired level
  let levelToLoad = metacar.level.level0;
  
  // If a level is avaiable in the storage, load this level instead.
  var levelObject = localStorage.getItem('mylevel.json');
  if (levelObject){
      levelToLoad = JSON.parse(levelObject);
  }
  
  // Create the editor (canvasID, levelUrl)
  var editor = new metacar.editor("editor", levelToLoad);
  editor.load().then(() => {
      editor.addEvent("save", (content) => {
          // Put the object into storage
          localStorage.setItem('mylevel.json', JSON.stringify(content));
          window.open("/test_editor.html");
  
      }, {download: true, name: "level.json"});
  });