This is really very nice, creative... I like the soft, cold look. You might add another tree, shorter than the other two, towards the middle of the canvas (not exactly in the middle) and closer to the window to create a better composition, and then I would define the window frame a little more (add some detail) to bring it closer to you. Really good work, anyway. :)
drawn in 39 min
|XOD|
drawn in 34 min
|XOD|