Overall you have a good consistency with the style and you did the text well. But one aspect that bothers me is how much the character seems cut off by his speech bubble. Don't be afraid to let him overflow a bit; it adds character to the piece and makes things more interesting. Also, inside the character you lack the shadowing that ilkke uses in his pieces. It would be useful to sort the lines by depth mentally and see where you need shadows--they're pretty much downshifts by one or two palette slots around the perimeter of the nearer lines. One last thing to note is that the comparatively high saturation and brightness of the background makes it more distracting than is good for the piece--you want viewers looking at the teddy, not the negative space behind him.  But aside from those few elements, you have a very competent Ilkketar.