Sure, here's a sample racing game implemented as a single HTML file using JavaScript. Please note that for the sake of simplicity, the game is quite basic and may not involve complex graphics or animations. Also, this implementation assumes smartphone operation and uses pictograms to represent elements of the game.
To play the game, you can copy the above code into a new HTML file (e.g., `racing_game.html`), save it, and open it in a web browser. The game will start automatically, and you can control the car by tapping on the left or right side of the screen. The objective is to avoid the obstacles (represented by colored squares) and score as many points as possible before colliding with an obstacle. Once the game ends, a prompt will inform you of your score.