Hide real-time playback countdown outside of flag levels. Later we can figure this out dynamically.

app/lib/surface/CountdownScreen.coffee

@@ -10,6 +10,7 @@ module.exports = class CountdownScreen extends CocoClass
     options ?= {}
     @camera = options.camera
     @layer = options.layer
+    @showsCountdown = options.showsCountdown
     console.error @toString(), 'needs a camera.' unless @camera
     console.error @toString(), 'needs a layer.' unless @layer
     @build()
@@ -44,14 +45,17 @@ module.exports = class CountdownScreen extends CocoClass
 
   show: ->
     return if @showing
-    @showing = true
-    @dimLayer.alpha = 0
     createjs.Tween.removeTweens @dimLayer
-    createjs.Tween.get(@dimLayer).to({alpha: 1}, 500)
-    @secondsRemaining = 3
-    @countdownInterval = setInterval @decrementCountdown, 1000
-    @updateText()
-    @layer.addChild @dimLayer
+    if @showsCountdown
+      @dimLayer.alpha = 0
+      @showing = true
+      createjs.Tween.get(@dimLayer).to({alpha: 1}, 500)
+      @secondsRemaining = 3
+      @countdownInterval = setInterval @decrementCountdown, 1000
+      @updateText()
+      @layer.addChild @dimLayer
+    else
+      @endCountdown()
 
   hide: ->
     return unless @showing

app/lib/surface/Surface.coffee

@@ -114,7 +114,7 @@ module.exports = Surface = class Surface extends CocoClass
     @screenLayer.addChild new Letterbox canvasWidth: canvasWidth, canvasHeight: canvasHeight
 
     @lankBoss = new LankBoss camera: @camera, webGLStage: @webGLStage, surfaceTextLayer: @surfaceTextLayer, world: @world, thangTypes: @options.thangTypes, choosing: @options.choosing, navigateToSelection: @options.navigateToSelection, showInvisible: @options.showInvisible
-    @countdownScreen = new CountdownScreen camera: @camera, layer: @screenLayer
+    @countdownScreen = new CountdownScreen camera: @camera, layer: @screenLayer, showsCountdown: @world.showsCountdown
     @playbackOverScreen = new PlaybackOverScreen camera: @camera, layer: @screenLayer
     @normalStage.addChildAt @playbackOverScreen.dimLayer, 0  # Put this below the other layers, actually, so we can more easily read text on the screen.
     @waitingScreen = new WaitingScreen camera: @camera, layer: @screenLayer

app/lib/world/world.coffee

@@ -17,6 +17,7 @@ REAL_TIME_BUFFER_MAX = 3 * PROGRESS_UPDATE_INTERVAL
 REAL_TIME_BUFFERED_WAIT_INTERVAL = 0.5 * PROGRESS_UPDATE_INTERVAL
 REAL_TIME_COUNTDOWN_DELAY = 3000  # match CountdownScreen
 ITEM_ORIGINAL = '53e12043b82921000051cdf9'
+COUNTDOWN_LEVELS = ['sky-span', 'dueling-grounds', 'cavern-survival']  # TODO: determine flag usage dynamically
 
 module.exports = class World
   @className: 'World'
@@ -104,7 +105,10 @@ module.exports = class World
         @realTimeSpeedFactor = 3
       else
         @realTimeSpeedFactor = 1
-      return setTimeout @finishCountdown(continueLaterFn), REAL_TIME_COUNTDOWN_DELAY
+      if @showsCountdown
+        return setTimeout @finishCountdown(continueLaterFn), REAL_TIME_COUNTDOWN_DELAY
+      else
+        @finishCountdown continueLaterFn
     t1 = now()
     @t0 ?= t1
     @worldLoadStartTime ?= t1
@@ -199,6 +203,7 @@ module.exports = class World
 
   loadFromLevel: (level, willSimulate=true) ->
     @levelID = level.slug
+    @showsCountdown = @levelID in COUNTDOWN_LEVELS
     @levelComponents = level.levelComponents
     @thangTypes = level.thangTypes
     @loadScriptsFromLevel level