I really like it, but I have some points you could try to improve

You could move the renders a little to the right, to fill the open spot at the right (just a little).
I don't know if this was what you wanted, but I can't really see where the light comes from,
there are much bright/white spots, which is a nice effect though.
Text is fine, blending could be a bit better like you said yourself, but overall:
Great work
