This is great, but its so close to being brilliant.
Instead of mirroring the image, it would really take the design up a notch if you drew more symbols for the bottom half.
You could even use the same elements as the top half if you wanted, but change them, make them say more.
It just doesn't work as hard as it could do.
you could continue the narrative, the balloon could be popped, the smile into a frown, different hand symbols, dollars into yen etc.