This is really good! Love the character design. I'm not an animator (I'd like to be) so while I was scrutinizing, trying to find something to possibly point out, the only thing I could notice is that as the tie flicks up it looks to me like it lingers a little too long before flicking back down, but again, I'm not an animator so I don't really know what I'm talking about...but I watch A LOT of cartoons (that counts for something, right?).
Keep it up! (the animating, not the tie ;-P)