That last line...
...probably saved the flash from me blamming it.
It was probably the fact that the voice was obviously male, and to me, it had a bit of a swedish accent to it that just made it priceless.
Personally, I think that the characters should be drawn in the same style. It bugged me that the girl was so detailed and the boy just looked like an after thought. It's not like they moved that much, you could put in a little more effort in him.
Nice try though.