It's neat! But he seems a bit older here... and about the rough lines, personally, it looks like you were actually going for the sketchy feel - if you watch the animation.

Actually, Noremac, you can get very smooth lines outta Paint. It just...takes a lot of time. .__. Go look at Hakkai's board; she is the queen of smooth lineart.

And nice job with Sora. Maybe next time add some color to the background?

Oh! You're done? I suppose so, since there's no "<unfinished>"... I really think that a pale background would work really well here, but not just white... You've probably seen the official art for KH, where Sora's standing partially in the ocean, so what would really work here yould be a subtle sky fading into white. Yeah, that'd work, but I really shouldn't impose ideas on people...