This is Knights Of Cydonia by Muse, if you are going to make a cover of the song you should at least put a backing music in to go with the guitar. And if you were trying to get people to think you made this song up? Then you have problems, copying people is not the way to go, trust me. If you are making a cover of a song? Put the name and band up, the title this song should have been "Knights Of Cydonia - Muse (Cover)".

Go on youtube, you can see heaps of covers done by many bands, you should check this out, http://www.youtube.com/watch?v=eSjK4_
jO_t8&feature=related

And I'm not saying you are a bad guitarist, but if people say you are? Don't believe them, I'm guitarist myself, and when I first started I was shit as hell, but the best advice for you is.. Practice makes perfect.