Betty Boop Double Shift review at IGN.

"I know that Nintendo's been focusing on the "older" gaming crowd, but this might be taking the age thing a bit too far: of all the properties to base a Nintendo DS property around, Betty Boop probably isn't the most timely of licenses to snag. Max Fleischer created the character in the 1930s and she's never left that era. Perhaps that's her charm: though cartoon characters come, characters go, and the ones that stick around evolve to keep up with the current ages and trends. But hey, if they can name a diner in San Francisco after her, why not put her in a videogame as well? Destination Software's Betty Boop Double Shift isn't much more than a clone of Diner Dash, a game that already shipped on the DS several months ago. The game's a challenge if you stick with it, but this game isn't nearly as good as its inspiration."

Full Source: IGN