Begin a large pot of salted water to boil. Once the water reaches a full boil, add 8 ounces noodles and cook according to the package directions (about 4-5 minutes).
While waiting for the water to boil, prepare the spicy sriracha sauce. In a small bowl, stir together 1 Tablespoon brown sugar, 2 ½ Tablespoons soy sauce, 1-2 Tablespoons Sriracha, 1 teaspoon ginger, and 1 teaspoon sesame oil.
In a large skillet, melt 1 Tablespoon butter over medium-low heat. Add ½ teaspoon crushed red pepper to the butter, and once it's completely melted whisk in 2 eggs. Stir gently and cook for about 3 minutes. Once the eggs are done cooking, transfer eggs to a small plate; set aside.
Add 1 Tablespoon oil to the pan and increase the heat to medium-high. Add ½ pound shrimp or more and cook for 2 minutes on each side, or just until firm and bright pink. Remove with a slotted spoon and transfer to a clean plate; set aside.
Add 1 zucchini to the pan, increase heat to high, and remaining 1 Tablespoon oil; stir fry until just charred; about 3 minutes. Stir in 3 minced garlic and cook for one minute.
Add drained noodles to the skillet along with the cooked egg, shrimp, and prepared sauce. Turn the heat on to medium-low, and stir until everything is coated well with the sauce. Sprinkle 3 sliced green onions and handful chopped cilantro and serve immediately, served with wedges of lime.