Sure! Here is a simple game that you can play on a smartphone using JavaScript and pictograms:
In this game, you control a ball represented by a filled circle. The ball moves around the canvas and bounces off the walls. The game loop continuously updates the ball's position and redraws it on the canvas. You can play this game on a smartphone by opening it in a web browser. The ball will move automatically, and you can watch it bounce off the walls.