As an AI language model, I can help you generate code for a simple game featuring an airplane shooting a gun to defeat a boss named Shahzaib. However, it will be in text format instead of an actual playable game. Here's an example code:
This code creates a simple game where the airplane is controlled using the left and right arrow keys. Pressing the spacebar shoots a bullet. The objective is to hit the boss with the bullet, which then triggers an alert message indicating that the boss is defeated.
Please note that this is a simplified code snippet and it may require further enhancements and adjustments based on your desired gameplay and graphical assets.