Was about to comment when my dumbass drunk brother tried to pull the computer away...lol
1. You used colors from the render and integrated them into the BG.
2. You used some sort of c4d.
1. It needs some sort of lighting
2. The render is smudged a little too much around the edges
3. Text is bad
4. More effects, like c4ds, fractals, stocks (set at a low opacity behind your render)
It's a good start, and I'm sure your next will be even better.