code: function(x, y){
              var coords = this.renderer.mouseToTileCoords(x, y),
                  tile = this.map.get(coords.x, coords.y);
              if(tile){
                  this.renderer.hoveredTileX = tile.x;
                  this.renderer.hoveredTileY = tile.y;
              } else {
                  this.renderer.hoveredTileX = null;
                  this.renderer.hoveredTileY = null;
              }
              this.renderer.draw();
          }
docs: Handles tile mouse hover events
  @method onHover
  @param {Number} x - Mouse x coord relative to window.
  @param {Number} y - Mouse y coord relative to window.