Copyright and Protection


I have created a game with my own original ideas, and I was thinking about publishing it out on the internet. The only problem is that I am worried about copyright violators, and compiling(spelling?)/thieving programs where the viewer could create a copy of my game(or steal it all together @_@). I need to know if there is anyway of thief proofing(protecting) my games, and if so, how can I do this? If anyone has the answer, and would like to take time to help me out, I would be extremely grateful. Thanks.