Thanks. :)
I'm not going to try to be mean or anything. I'm giving you critique. ;)
Well, to start I notice that the tag is low quality. Don't sharpen the background too much. Sora is placed in the wrong place imo, he should be flipped and placed on the mid-left. The colors are okay, but they seem a bit oversaturated. The squares on the left seems random also imo. You need to work on compo, depth, colors, and quality.
Well, that's my crit. :D
What program do you use?