WHY has nobody commented on this yet? This is beautiful, and the level of detail is amazing- like the shingles on the roofs and the Castle That Never Was. I know from experience drawing/coloring the Clock Tower and Memory's Skyscraper is a pain, but you captured them quite well. I think the only thing I see that I could critique would probably be Roxas's hair- I think it should be a little more spiked up on his right (our left) side.
Roxas's hair was pretty tough to get down >.< But the most difficult part of this drawing was actually the small buildings of Twilight Town. I have a hard time with buildings in general, so the main purpose of this drawing was for me to practice on my backgrounds.