Wow very nice vector and painting ^_^
i admire your work trofikabinet, and keep up the great work =D

Nice vector, I have a few things I want to take a stab at though.
The vector doesn't blend in the wall at all, they're in the night time so they
should be darker or their colors should be changed to fit the night time.
Also, the color of the night looks weird..you've got like purple and orange, looks
too halloween-ish to me. How you made the clouds doesn't fit into the bg, you were
better off leaving them off.
I do like the moon, it's a nice color and gives a nice creepy feeling to the wall.
The trees in back could use some blurring, they're too close to the two of them.
Nice wall, just think the bg and some elements need more work.

Try looking at references for night scenes to see how to make them blend in more if you find yourself needing help.