Bit Boy!! follows a character called "Kubi" on an adventure that spans console generations, starting at 2600-style "4-bit" and progressively increasing in graphical complexity toward a modern 128-bit look. No real details about the gameplay have been given, other than that it uses either d-pad controls or a virtual Wiimote joystick, and that it features co-op play. But the concept alone has our attention!
