Sure! Here's a simple racing game implemented as a single HTML file using JavaScript and enclosed in script tags. The game is optimized for smartphone operation and uses pictograms for the race cars.
In this game, you control the player's car using the left and right arrow keys to move it across the screen. The opponent cars (not shown in the code for brevity) move automatically from right to left. The player's car and the opponent cars are represented by pictograms using the provided URL to the car pictogram.
Note: To make this game playable, you will need to add further functionality, such as collision detection, scoring, and other game elements. This basic code serves as a starting point for developing a more comprehensive racing game.