Sure! Here's the code for a simple Snake.io game implemented as a single HTML file:
To play the game, simply open the HTML file in a web browser that supports JavaScript. On a smartphone, you can also play it by opening the HTML file in a mobile web browser. Use the arrow keys to control the snake and try to eat as much food as possible without hitting the walls or the snake itself.
Note: This game is a simplified version of the popular Snake.io game and may not have all the features and visuals you might expect from a complete game. Feel free to modify it or add more features to suit your needs.