         when 13
           # ENTER
           if @running then @pause() else @rescue()
+          event.preventDefault()
         when 27
           # ESC
           @game.reset()
+          event.preventDefault()
 
   disable_controls: () ->
     if @map.p1_tank()

        @map.p1_tank().commander.add_key_event("keydown", event.which)
      if @map.p2_tank()
        @map.p2_tank().commander.add_key_event("keydown", event.which)
      false

  enable_system_control: () ->

          # UP, LEFT
          @current_stage = @game.prev_stage()
          @update_stage_label()
          event.preventDefault()
        when 39, 40
          # RIGHT, DOWN
          @current_stage = @game.next_stage()
          @update_stage_label()
          event.preventDefault()
        when 13
          # ENTER
          @game.switch_scene('game')
          event.preventDefault()
      false

  disable_stage_control: () ->
