I do not remember the classic game
This was pretty fun to play, but the weakest point would probably be the graphics. The patrol device itself looks silly with all those bright colors. Still, it has a simple enough premise to follow through. I was so relieved to find out you were able to shoot those stupid rocks to pieces. It may not be the most creative thing out there, but the sounds are decent and it does make for a pretty addictive game for a few minutes at least. I am not sure why you chose the theme of the alphabet, but it does pace it well.