Sure! Here's a simple game called "PictoTank" implemented as a single HTML file:
PictoTank Game
In this game, you control a tank using the arrow keys on your smartphone. The tank is represented by a blue square pictogram. You can move the tank up, down, left, and right within the game canvas.
Please note that this is a basic example to demonstrate the game mechanics. You can enhance it further by adding obstacles, enemies, scoring, and more.