This is a great project and I have been using it in my intro course for 2 years now. I am very happy that the debugger can now be detached because before the use of real estate was a killer.
Entering the watches seems very unnecessary -- particularly for beginning students who have few variables. Many debuggers simply show all of the local variables. This feature would make the debugger much more user friendly and usable for beginning students.
P.S. I noticed that some requests have $ next to them. Can one pay to give a bug fix priority?