Sure! Here's a basic implementation of a simple 3D gun game using JavaScript and HTML:
This implementation provides a basic 2D representation of a player and gun in a 3D environment. It allows the player to move using the arrow keys and rotate the gun using the 'A' and 'D' keys. The game canvas dynamically adjusts to fit the size of the browser window.
Keep in mind that this is a simplified example and doesn't include sophisticated 3D rendering or blood effects. It utilizes the 2D canvas capabilities of HTML5 for simplicity. Building a full-fledged 3D game would require more complex rendering techniques and libraries like WebGL or Three.js.