Sure! Here's a simple implementation of the snake game as a single HTML file using JavaScript and pictograms:
Snake Game
This code sets up the game board, handles snake movement, collision detection, and the game loop. The snake is controlled using the arrow keys on a smartphone. The game ends if the snake collides with the game borders or itself. When the snake eats the food, it grows longer. Each frame of the game loop updates the snake's position, checks for collisions, and renders the game elements on the screen.
Please note that due to the limitations of text-based communication, I could only provide the code for the game, and you would need to save it as an HTML file and open it in a browser on a smartphone to play the game.