Sure, here's a simple game implemented as a single HTML file that you can play on a smartphone. It uses JavaScript for the logic and includes some pictograms.
This game sets up a canvas element and uses the HTML5 Canvas API to draw a ball that responds to gravity and bounces off the ground. You can control the ball by tilting your smartphone. As a player, your goal could be to keep the ball from touching the ground for as long as possible. Feel free to enhance and customize the game as you see fit!