Sure! Here's a simple implementation of the classic game Snake using JavaScript. It's designed to be played on a smartphone and uses pictograms for the snake and food.
Snake Game
You can copy and paste the above code into a single HTML file and open it on your smartphone to play the game. The snake starts moving automatically, and you can control its direction using the arrow keys. The snake grows longer each time it eats the food. The game ends if the snake hits the wall or itself. You can adjust the speed by changing the timeout value in the game loop (`setTimeout`).