Pretty sweet effects, however it's very bright and over-contrasted.
Make sure that you keep some things dark in the sig or else it's too overwhelming.
The text should be much larger in a wider and taller piece like this.
Stick with only one colour for fonts.
As for the background, try and make it simpler, it works much better if you can keep this easy on the eyes.
And I think you may be having trouble because of your render choice, try and choose renders that will fill the space better, not stick thin renders that you have to work around.
The effects aren't bad, so keep those.