Hello
I join everybody in saying that the quilt is gorgious.
Also, I suggest a fairly tight quilting, as this will further stabilize the quilt.
Thank you for sharing the program you used. I downloaded it and "testdrove" it. I love it, it was exactly what I was looking for. Have been playing with GIMP before but it didnt come out quite that nice. Will collect fabrics now for my own pixel quilt.