Sure, here's an example of a simple game implemented as a single HTML file using JavaScript. The game features a car with a speedometer, and the objective is to increase the car's speed until it reaches 1000 km/h. Pictograms are used to represent the car and speedometer.
🚗
Speed: 0 km/h
In this game, when you open the HTML file on a smartphone, you will see a car emoji
🚗 along with a speedometer displaying the current speed. The speed starts at 0 km/h and increases by 5 km/h every second. Once the speed reaches 1000 km/h, the message "Max speed reached!" will be displayed.