This is a fun tile and I really like the style that the creature is drawn in. Two suggestions for you that would improve it: First, draw beyond the borders of your tile. It's very hard for neighboring tilers to blend to yours when your image stops short of your borders. Notice how the edges of other tiles disappear when elements from one tile continue into the next. Second, moving away from flat colors in the background, especially black, is usually a good idea; it creates a more interesting tile in general.