Combine sugar and water in a small saucepan. Simmer over medium heat until sugar is dissolved. Remove from heat and stir in rose water. Let syrup cool completely. Place noodles in a heatproof bowl. Add enough boiling water to cover and let stand for five minutes or until soft. Drain and rinse under cold water. Cut or tear noodles into two-inch pieces. Combine noodles and syrup in a shallow glass or metal baking dish. Place in freezer. After one hour, remove from freezer and stir with a fork. Return to freezer for another hour, rake with a fork, and then put back in freezer until desired consistency is reached, about one to three more hours. To serve, rake with a fork and scoop into bowls. Serve with fresh lime juice or lime wedges.