Thats great PlayMoney I was going to mention my library in this thread, then you had created a full pong game on top of it, if I had a pot that did not require a screw driver to operate I would have to try it.
As far as color goes thats beyond the scope of the library, gray scale is possible with some slight modifications to the library but it would require twice as much memory.
PAL is super easy just change _NTSC to _PAL when you call begin.