cute..

like the color scheme somewhat. The subject is a bit stiff, but! maybe that was your approach, the focus has been on the balloon.
if you had titled this differently.... maybe I wouldn't have revolved the situation around the balloon.
The characters face is fine to an extension, she feels stiff, as she had been frozen with a smile. give her some flow, some movement, make her seem as she has weight and an uplifting feel.
other than that keep going! You have skill!