At the end of each episode of Ro-Kyu-Bu!, and sometimes during the episode content, the girls are seen talking to each other or to the audience in chibi form. Usually there is 8-bit music in the background, and the characters appear to be sprites (without animations).
Is this a game they're playing? Or, is it something more meta (like a representation of them talking by phone)? If it's a game, does it have a name?