melonJS error

gistfile1.txt

Browser error:

Uncaught TypeError: object is not a function melonJS-0.9.5.js:411
Object.extend melonJS-0.9.5.js:411
obj.newInstanceOf melonJS-0.9.5.js:4960
api.addEntity melonJS-0.9.5.js:1326
api.loadTMXLevel melonJS-0.9.5.js:1273
obj.loadLevel melonJS-0.9.5.js:11212
me.ScreenObject.extend.onResetEvent main.js:64
me.ScreenObject.Object.extend.reset melonJS-0.9.5.js:1801
_switchState melonJS-0.9.5.js:2084
(anonymous function) melonJS-0.9.5.js:529

main.js:64 :

PlayScreen = me.ScreenObject.extend({
    onResetEvent: function() {
      return me.levelDirector.loadLevel("area01"); // <--------- 64
    },
    onDestroyEvent: function() {}
  });