TOKYO--Nintendo is developing a new puzzle game for its upcoming DS handheld, according to Akira Sakuma, producer of the popular Momotaro Densetsu video board game series. Sakuma revealed this in an entry in his personal diary, which concerned his recent visit to Nintendo headquarters together with Momotaro series illustrator Takayuki Doi.
"I got to see a puzzle game that's currently in development [for the DS]", comments Sakuma in his diary. "Doi just wouldn't stop playing the game, saying, 'I can't stop playing this game it feels like popping bubble wrap!' "
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http://www.gamespot.com/news/2004/09/03/news_6106612.html