It looks like the camera exposed for everything except the young lady’s face,
which makes it look very dark and shadowy. Seeing as the balloon is so prominent
as a result, it’s worth mentioning that there are some processing artefacts around
the writing. Not sure what causes these.
Personally, I wish you’d homed in on the girl’s face, got down to her level and
tried to get a smile, or at least, some engagement.