I've recently downloaded your backgammon software and have had the pleasure to play with this one for several weeks. First of all, it plays a very good game of backgammon ... quite aggressive play strategy. The one area that could use some improvement is the following:
Ex. when a 6 and a 3 show on the die faces ... if you click on one of your tiles, it will move it 6 spaces. Then, when you click on the second tile that you wish to move, it will move it again 6 spaces, making it an illegal move. Better would be the following. You roll the 6 and 3 as above. Click on the tile that you want for the larger number that was rolled. Click on the second tile to move the smaller of the two numbers that were rolled.
Other than that, I think that this is a great demo version !! Great job.