Sure! Here's an example of a simple Subway Run game implemented as a single HTML file using JavaScript and pictograms:
In this game, the player controls a character (boy) that can run, jump, and move left or right using the arrow keys on a smartphone. The character is displayed as a blue rectangle, and the ground is displayed as a green rectangle. The game loop continuously updates and redraws the canvas.
When the player presses the "ArrowUp" key, the character jumps, while "ArrowRight" and "ArrowLeft" keys allow horizontal movement. The character is restricted from jumping while already in mid-air to simulate realistic physics.
Please note that this is a basic implementation of a Subway Run game. You can enhance it further by adding obstacles, power-ups, scoring system, and more based on your requirements and game design.