Thought this may appeal to any homebrew developers out there.
Oh yes, it's a game too:-
Lumines brings a unique puzzle experience to PSP handheld system owners, offering gameplay reminiscent of Tetris while including new innovations and enhancements in technology that fuse music, puzzles and luminescence. Users are challenged to delete blocks from the game screen while grooving to evolving musical scores of rock, techno and pop grooves. Lumines offers numerous levels of graphics and music with single-player, wireless multi- player and bonus modes. Earn changeable skins and increase amount of collectible characters.