Sure! Here's an example of a simple game implemented as a single HTML file using JavaScript. The game is played on a smartphone and uses pictograms. You can copy and paste this code into an HTML file and open it in a web browser to play the game.
This code sets up a simple game where you control a red square (represented as a pictogram) using the left and right arrow keys. The player can move horizontally within the canvas boundaries. The game loop continuously redraws the player based on the user's input and animates the game.