Here is another early Dreamcast homebrew game and this is another fine example of development for the Dreamcast. It was released in the early 2000's by an unknown author and is a tetris clone which kind of represents the Gameboy version of Tetris. Its a very beautiful clone I've seen many for Dreamcast but this one right here stands out. This is in SD Format but you can extract the ISO and use Bootdreams to make a bootable Dreamcast CD-Rom Image.
Download available at:
ISO Make available at: http://www.dc-swat.ru/page/dreamshell/