I like the atmosphere but I think you blurred so much that the render looks like it's just there and floating.
I think the colors of the render/explosion could use an improvement as well. They seem a little too yellow. Has potential to be a great tag.
Render doesn't fit right now. You need to fix the lighting on it and blend it in a bit. It just sticks out too much.
your the first person i saw that did something good with a halo sig and all i got to say is this bravo
I thought the blue color would give it a nice space feeling to it. But whatever I'll fix it again I suppose.