Too many balloons!
cute drawing, but I have to second what legolass said.
I think you overdid the grain; Try blurring the grain layer, that takes the edge off it. The shading/highlights on the balloons must have been a lot of work. It shouldnt have been so much work though, considering that the middle balloons should be in the shade of the other balloons. that could have made the bundle of balloons look more like a bundle too.