Nice, thanks for posting this
Sadly the flu hit me very hard some days ago, so I had to push back release of the NewtonPlayGround till next week or so (depending on how fast I recover). But basically everything is done, I also made some changes to the user interface to make it easier to use (graphical buttons for the context menu e.g.) and fixed some bugs. Only thing left to do now is to make two or three new example scenes to show the features I added in this release and I'll be done.

After this I'll continue work on the other project you can see on my blog, which I don't want to reveal too much about as of now