Sure! Here's an implementation of the classic Snake game using JavaScript and enclosed in script tags within a single HTML file. You can play the game on a smartphone and it includes pictograms.
To play the game, open the HTML file on a smartphone and use the arrow keys (up, down, left, right) to control the snake. The objective is to eat the red food and avoid hitting the walls or yourself. The game will end and display the score when the snake collides with a wall or itself. Enjoy!