I made a game for the original Nintendo that uses a light gun! (Patreons at the 1 dollar tier and up can play it right now!)
The game itself is pretty simple. There are 4 characters on screen. 1 player character, and 3 computer characters. Player 1 uses the controller to move the player character. Player 2 has the light gun (Nintendo Zapper), and will try to shoot player 1s character.
If player 2 shoots the player character then player 2 wins.
If player 2 shoots a computer character, then player 1 wins.
Player 1 needs to pretend to be a computer character by trying to move like the computer characters in order to try and trick player 2 into shooting the wrong character.
The game works on Nintendo Emulators and in real Nintendo hardware if you have a flash cart or everdrive!