Better handling of non-user-code problems in game-dev mode. Don't simulate whole level first time a game-dev level is loaded.

app/assets/javascripts/workers/worker_world.js

@@ -507,6 +507,11 @@ self.onWorldError = function onWorldError(error) {
   }
   else {
     console.log("Non-UserCodeError:", error.toString() + "\n" + error.stack || error.stackTrace);
+    if(self.world.indefiniteLength) {
+      // We don't abort completely, since the player can always click to end the game.
+      // TODO: some better error to the user would be nice, though.
+      return true;
+    }
     self.postMessage({type: 'non-user-code-problem', problem: {message: error.toString()}});
     return false;
   }

app/lib/Angel.coffee

@@ -234,7 +234,7 @@ module.exports = class Angel extends CocoClass
     @running = false
     @work = null
     @streamingWorld = null
-    @deserializationQueue = null
+    @deserializationQueue = []
     _.remove @shared.busyAngels, @
     @abortTimeout = _.delay @fireWorker, @abortTimeoutDuration
     @aborting = true
@@ -254,7 +254,7 @@ module.exports = class Angel extends CocoClass
     @initialized = false
     @work = null
     @streamingWorld = null
-    @deserializationQueue = null
+    @deserializationQueue = []
     @hireWorker() if rehire
 
   hireWorker: ->

app/views/play/level/tome/TomeView.coffee

@@ -139,7 +139,8 @@ module.exports = class TomeView extends CocoView
   onSpellLoaded: (e) ->
     for spellID, spell of @spells
       return unless spell.loaded
-    @cast()
+    justBegin = @options.level.isType('game-dev')
+    @cast false, false, justBegin
 
   onCastSpell: (e) ->
     # A single spell is cast.