SONIC signature

The composition is good.
The text is bad and to big, make it smaller.
The background is in the wrong direction, it has to go with the flow ( same direction ) as ur render. Thats not diagonal as you have it in this case. Also, try to pick some other colors. I know its easy to make it all the same color as your render but try to do something different, pick a different color! You kinda have to feel what color but once you have it, the sig would look a lot less boring!
You have to smudge your render into the background. Just grab the smudge tool and smudge the edges.
So a lot to improve but you already have a nice start
Keep it up mate!