Hi, great program :) I've wanted something like this since Black and White introduced me to gestures.
A couple of things that could be improved:
1) It's been mentioned in the thread below, but the learning area seems pretty clumsy. When i train it, i want to be able to just sit there for ten minutes teaching it over and over. To do that now takes longer because you are jumping though several windows to do it.
2) Purely cosmetic, but the tracing line is seriously ugly. Maybe make it thicker wish some transparency and antialiasing. Along the lines of the Black and White game would be nice. It would mean the program takes up a lot more resources than it does currently, so i guess it would have to be an option in the preferences or an add-on.
Anyway, thanks for the program, I'm really enjoying it.