Py , how are you doing with your "shapes mode" idea? When are you going to make the shapes collision accurate. And the trianguler shaped robots by theory should spin like gears when then are next to each other.
I also thing this mode should not be as a smily icon on the main toolbar. Instead make it in the advanced mode selections area to go allong with:
"Space Mode" (checkbox in settings) 'see other posts
"Cloack Mode" (checkbox in settings) 'see other posts
"Shapes Mode" (checkbox in settings 'PY's idea
These modes can work simultaneously as I already discussed.