is this person talking on a phone while blood splurts out the back of the head?

It's not fair to ask how you can constructively criticise this picture. Just because it's a different style doesn't mean you can't constructively criticise it. Art shouldn't have any rules or boundaries, and that goes for any style.

Either way, it's a picture by Zappo. I don't dislike anything of his.

Really? Do you know me from there of all places? Do you have a username there, too? If so, what is it? Anyway with the pic, I think it's cute for a first try. But Marcello's right, it's too blurry. And it's lacking shading. You might wanna use layers, too. But this is only your first try, right? RIGHT?! *hypervenelates* Well if it's not, oh well. I'm not a mean and evil person, and I don't wanna be, but the BG could use some work. I'm only trying to give construcive criticism which is good for an aspiring artist. (Look at me sounding like a high school art teacher or something...) Oh, and use Oekaki Shi-Painter, ish teh best! ^^

You could alsways press the float button to give you a full screene....

it could just be a fat pikachu

want to finish some before starting new ones?

Cool. I like the thick outlines on the wings.

YAY! ^___-___^ I dunno what to say.. *tears up* Uh, your welcome! (P.S. Good use of pink and black!)

well the lineart is ok, but the coloring does no justice to the piece. The grass is alright, but everything else, especially the textured brush crap with seemingly random colors around the edge seems poorly thought out. You may try just a solid white or offwhite, or continue the grass and sky to the rest of the piece.

On the dog, the main problem is all those white bits. I would suggest start by coloring on a layer between the background and the lineart, and use a solid brush to completely fill in the character (not the fill tool!), then use a darker or lighter brush and add shadows/highlights to give it depth.

Last of all, as I've mentioned before, the copyright notice is really tacky. Personally I'd leave it out altogether until you're actually good enough that someone might want to rip you off. Anything you draw is automatically copyrighted whether you put that stupid little notice or not. If someone wanted to use it without your permission they could easily erase that copyright message anyway.
If you actually want to include, I suggest making it a lot less obvious (the copyright notice has a bigger presense than the drawing itself!). You could use a thin brush and write it very small, or simply use the text tool and put it in the corner of the picture out of the way and not distracting.