I don't know anything about programming, but it seems as if you should make the computer opponent smarter. Several times, I've played games where the bullet was in the sixth chamber, and I had the fifth shot. I dry fired the fifth shot into my head in order to see if the computer would shoot me with the sixth, but three times he shot himself in the head, even though five shots had been fired in a row, without spinning the revolver. Anybody who was paying attention would know that the bullet was in the sixth chamber, after five shots had been fired in a row.
Anyway, having said that, I love this game.