Web game maker Zynga is trying to turn its digital playground into an even more entertaining place amid investor doubts about its ability to build a long-lasting business. The features announced Tuesday include a network designed to provide players of Zynga\'s games with the same tools whether they are competing on Facebook\'s online social network, a mobile device or the company\'s own website. The network is called \"Zynga With Friends.\" That\'s a reference to one of Zynga\'s most popular games, the Scrabble-inspired \"Words With Friends.\" Zynga Inc. also previewed several new games, including a food-themed title called \"ChefVille.\" Investors evidently weren\'t impressed. Zynga\'s stock fell 30 cents close at $5.77. That\'s well below Zynga\'s initial public offering price of $10 six months ago. Zynga has more than 290 million users. The Daily Star