If I am brutally honest, I don't like it too much.
The salvation is the cool metal around the blue orb.
Comments - Good
The blue orb looks cool.
The metal around the orb is even better.
I like the white "stars" or whatever they are in the background.
Comments - Things I dislike
I don't like the text, it is barely readable.
The colours you have used, in my opinion are ghastly.
That squiggle thing, looks cool, even though it seems out of place.
Tips and advice
Try for more readable text, if it were me, I'd stick away from graffiti style text.
Stick to a more limited pallette.
Look here for tips and advice:
psd.tutsplus.com has a great tutorial in graphical design, try looking at some of the colour theory and typography for tips and advice.
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Those are my thoughts, keep on trying, you have great potential in my eyes :-D