Preheat oven to 350° F. Spray a 9x13-inch glass baking dish with non-stick spray.In a large non-stick skillet cook and crumble sausage over medium-high heat until browned. Drain any grease.In a medium saucepan heat milk over medium heat. Whisk in flour. Stir constantly until thickened. About 3 or 4 minutes. Add cubed cream cheese to milk and cook and stir until cream cheese is melted and all combined.Pour gravy into prepared baking dish. Spread out evenly. Sprinkle cooked sausage evenly over gravy. Top with a little black pepper and pinch of red pepper flakes, if desired.Remove biscuits from can and place on top of sausage and gravy. ( I only fit 6 for looks. You can squeeze in the other 2 if you're not worried about that. If you are bake the other 2 along side the caserole OR you can cut up all the biscuits into quarters and place the quarters all over the top.)Bake in preheated oven for 25 to 30 minutes or until biscuits are golden-brown and cooked through. (You may need to cover the top with foil the last five minutes to prevent tops from burning.)