I could need some critiques/paintovers

[kerm]

You should think of planning value even more. I did a quick paintover. If you want a pitch-black night, then the things nearest to the "camera" should be the brightest. Things in between should be in the middle of birghtness and background should be the darkest. It will give you the feeling of space. What's more, the foreground should have the greatest contrast, where as the values of background should be close. When you plan your values stick to their range. Do not use highlight values from foreground on background etc. Of course, it's your piece of art so you can do whatever you like. Have fun with it. :) What I have written is just the way I would see this picture. :)

EDIT: Made you a quick thumbnail of what I mean.