Sure! Here's an example of a simple Snake game implemented as a single HTML file with JavaScript enclosed in script tags:
This implementation creates a game board using a `div`, generates a snake and food using CSS classes, and allows the player to control the snake using arrow keys. The snake moves every 200 milliseconds, and when it eats the food, it grows longer. The game ends when the snake hits the border or collides with itself.
Please note that this is a basic implementation to give you an idea of how a Snake game can work. You can further enhance it by adding more features and improvements based on your requirements.