Sure! Here's the code for a simple Snake game with guns implemented as a single HTML file:
This game has a simple snake represented by red squares, and the player controls the snake's movement with arrow keys. The snake can shoot bullets (represented by yellow squares) by colliding with the bullet on the game board. The game ends if the snake collides with itself.
Please note that this implementation is a basic version of the game and can be expanded and improved further based on your requirements.