Sure! Here's a simple implementation of the Snake game in a single HTML file using JavaScript:
To play the game, simply save the above code in an HTML file and open it in a web browser (preferably on a smartphone). The game starts automatically, and you can control the snake's movement by using the arrow keys. The goal is to eat the red food and avoid colliding with the game boundary or the snake's own body. As the game progresses, the snake becomes longer. The food appears larger and the snake moves relatively slowly. Enjoy playing!