     
     # LEFT
     keyDown_37: ->
+      return if @fixed
       @x--
     
     # UP
     keyDown_38: ->
+      return if @fixed
       if @rotation is 3
         @rotation = 0
       else 

    
    # RIGHT
    keyDown_39: ->
      @x++  
  
  

    
  level = new Level()
  gs.addEntity(level)
  gs.addEntity(new ZShape(x:1, y:1, color: '#f00', fixed: true))
  gs.addEntity(new SShape(x:5, y:5, color: '#0f0', fixed: false))
  gs.addEntity(new CubeShape(x:2, y:7, color: '#00f', fixed: true))
  gs.addEntity(new TShape(x:8, y:3, color: '#000', fixed: true))
