Sure! Here's a simple car racing game implemented as a single HTML file with JavaScript. It's designed for smartphone operation and uses pictograms for a visual representation of the game.
Just copy and paste the code below into a blank HTML file, save the file with a .html extension, and open it in a web browser to play the game.
In this game, you control a car using the left and right arrow keys on your smartphone's keyboard. The objective is to avoid hitting the edges of the canvas. The car is represented by a pictogram of a car (`🚗`). Use the left and right arrow keys to move the car accordingly.
Note: This is a basic implementation of a car racing game. You can further enhance it with additional features such as obstacles, scorekeeping, levels, etc., based on your requirements.