         @gui.addOpenFolder('gravity').addRange @physics.arcade.gravity, 'y'
 
       # First:
+      @_addMusic()
       @_addBackground()
       @_addPlatforms()
       # Then:

      @_toggleCameraAttachment on

      @debugging = off # Off by default for performance. Doing this after setup.

      @_addMusic()

    update: ->
      @physics.arcade.collide @player.sprite, @platforms.layer

      manager.play 'end' # @test

    _addMusic: ->
      @music = @add.audio 'bgm', 0, yes
      @music.mute = @developing or @debugging
      @music.play()
      @gui.add @music, 'mute'

    _addPlatforms: ->
      @platforms = new Platforms 
