Oh man, I loved that.
You have a Great gift for two-person dialog bits! I laughed all over the place reading this.
The flashing background got annoying, as did the loud, squeally, repetitive video game music. Try changing the music when you switch between the pairs of people, and make it less grating overall. Also, fix it up so that the music plays for the entire length of the film, and the credits music doesn't overlap onto the animation when the thing loops. I found problems with these things when watching it; I use Firefox.