Prepare noodles according to package directions; set aside.
Combine 1/2 teaspoon sugar, whiskey, and soy sauce in a bowl, and add shrimp. Cover and refrigerate.
Heat 1 teaspoon oil in a large nonstick skillet over medium-high heat. Add the sliced onions, and cook 5 minutes or until lightly browned. Stir in 1 teaspoon sugar, broth, and 1 tablespoon ketchup, and cook 2 minutes. Remove onion mixture from pan; keep warm.
Heat 1 teaspoon oil in pan. Add the shrimp mixture and green onions, and cook 3 minutes, stirring constantly. Stir in 1 tablespoon ketchup. Cook 1 minute or until shrimp are done. Stir in onion mixture. Serve over noodles.