This is an engine that simulates the player having a 6 shot revolver for a gun. It uses overlay to display the barrel of the gun with how many bullets are left at the bottom left corner of the screen.

The code is very neat and well documented. It wouldn't take a lot to edit this code to a specific need. It could be used at the very least as a learning example for robotics because it is documented so well.

Its a short and sweet engine that delievers. For its simplicity, effectiveness, and documentation I feel this engine deserves a full score of 5.