Sounds bloody hard! It might be an idea to think about the actual mechanics of the game once you've come up with a possible solution so that the game itself do

Sounds bloody hard! It might be an idea to think about the actual mechanics of the game once you've come up with a possible solution so that the game itself doesn't invite cheating behaviour or at least makes it easier to detect. i.e. Making it physically impossible to shoot faster than a specified rate or move too quickly/accurately, etc. Good luck!