I know I'm not that good at graphical work, so, what do you think of this?

 

 

 

Why did you choose the vomit-yellow/green color out of anything?

 

 

 

The background looks mostly like a filter pile. Its too flat and the image of the reaper takes up nearly the entire signature. The text as well is too blured on the botom and the grey does not work well on that background. (well, nothing would).

 

 

 

 

 

Read up some abstract tutorials.

since the reaper looks more like a drawing and the background is more digital they dont blend well at all, try looking for a new background that blends a little better with your centerpeice