Removed TilemapLayer.index getter as it incorrectly refereneced a property that didn't exist, breaking most demos. Couldn't see an obvious reason for the getter so restored previous property and tested all examples, and all run now (and faster too thanks to the rest of the changes made in TilemapLayer).

Author: photonstorm

src/tilemap/TilemapLayer.js

@@ -39,6 +39,14 @@ Phaser.TilemapLayer = function (game, tilemap, index, width, height) {
     */
     this.map = tilemap;
 
+    /**
+    * The index of this layer within the Tilemap.
+    * @property {number} index
+    * @protected
+    * @readonly
+    */
+    this.index = index;
+
     /**
     * The layer object within the Tilemap that this layer represents.
     * @property {Phaser.TileLayer} layer
@@ -253,22 +261,6 @@ Phaser.TilemapLayer = function (game, tilemap, index, width, height) {
 Phaser.TilemapLayer.prototype = Object.create(Phaser.Image.prototype);
 Phaser.TilemapLayer.prototype.constructor = Phaser.TilemapLayer;
 
-/**
-* The index of this layer (`layer`) within the Tilemap.
-*
-* @property {integer} index
-* @memberof Phaser.TilemapLayer
-* @readonly
-* @protected
-*/
-Object.defineProperty(Phaser.TilemapLayer.prototype, 'index', {
-
-    get: function () {
-        return this.layer.layerIndex;
-    }
-
-});
-
 /**
 * If no valid tileset/image can be found for a tile, the tile is rendered as a rectangle using this as a fill value.
 *