New to Sketchucation and I cannot see how to raise a new post so I hope this presses the right buttons. I have recently added Sketchphysics to my SU. I've found some basic tutorials but I have hit a brick wall naming controllers. The box is blue and whenever I try and enter a name I get an error message. I have seen a post that talks of entering a name between the quotes but this did not work either. I'm trying to get on top of Sketchyphysics but so I can passs on the skills to my design students so a tad frustrated.

Is there a good potted tutorial?