Pretty nice.
The shading on the bricks was done fantastically. You really drew them in a way that displayed the texture that they would have in real life and that really adds to the picture.
I like how the shading on the balloon isn't completely smooth. The sketchy feel of the drawing is one of its biggest pluses.
I also like how you faded out the drawing at the edges.
The imagery in the drawing is also pretty interesting, how you have this balloon floating right up against a brick wall instead of a sky or open area. It's simple imagery, but it also had a feeling of sadness tied to it. I don't know if that was the feeling you were going for, but that's just my interpretation.
4/5