Trying to binb hammerJs multi-touch into my current kineticJs 5.1 codes, found tips, but my puzzle pieces does not rotate at all, and my pieces are kinetic shape, why?

```
            var startRotate = 0;
            var hammertime = Hammer(piecesArray[i][j].shape);
            hammertime.on("transformstart", function(e) {
            startRotate = piecesArray[i][j].shape.rotation();
            }).on("transformstart", function(e) {
               piecesArray[i][j].shape.rotation(startRotate + e.gesture.rotation);
               layer.draw();
            }); 

```

my fiddle : <http://jsfiddle.net/e70n2693/20/>