It's ind of hard to identify the difference between the BG and the render. Maybe it's because I have no idea what the render is for lack of animation/whatever knowledge. I dunno.

The text isn't bad. The pen tooling gets pretty distracting. maybe tone it down a bit?

I would suggest blurring some of the BG too. Thats just my opinion though.

light source looks good, though a tad bit off. Bg goes really really well with the render. So gj with those.