How to change position of shapes interactively?

Hi everyone,
I am trying to achieve some interactive stuffs in Notch. I basically want to click and drag shapes to newer position. The Mouse picker node does the job partially for me. It helps to drag shapes and change position. But the problem I have is it moves all the shapes available in the scene at once, rather I want shapes to be individually clicked and dragged to newer position. I am very new to Notch, any help is much appreciated. Thanks.