Develop a Flappy Bird game where the player controls a bird that must navigate through a series of pipes by tapping the screen or pressing a key to flap its wings. The game should feature simple graphics and intuitive controls. The bird should move upwards when flapping and gradually descend due to gravity when not flapping. The player earns points for passing through each set of pipes without colliding with them. The game should end if the bird collides with a pipe or if it falls to the ground. Implement a scoring system to track the player's progress and display the highest score achieved. Add sound effects for flapping, collision, and score increments to enhance the gaming experience. Provide an option to restart the game after it ends to allow the player to try again and beat their high score.