Pong2 is an open-source game based on the original game of Pong. Pong2 has improved features over the original. The paddle can be moved horizontally and vertically. 10 tracks of background music are available during game play. The first player to score 10 points in each level is the winner.

Changes:

GUI:
– Update main menu screen information.
– Improve game icon.
Core:
– Improve stability.
– Improve network thread.
– Use libfat 1.0.7 as disk access engine.
– Use libogc 1.8.3 as Wii interface engine.
General:
– Make source code compliant with r21 compiler.
– Added source code to Google Code Repository
– Added source code documentation (Javadoc style).
– Added Doxygen (automatic documentation generation tool) config file.
– Build game with devkitPPC r21 compiler.

http://wiibrew.org/wiki/Pong2