The render isn't blended in with the BG so you should try to either smudge some parts of the render into the BG and put some effects over it to give the render depth (sometimes).
Looks like you got a bit happy with the glow effect lol. but it doesn't hurt to try new things :]
The text is to far low and don't try to find fonts that are hard to read. it's not very settling to my eyes and bring it more up to the render/head or somewhere near.