Sure! Here's an example of a car racing game with 5 levels that progressively get harder. The game is designed for smartphone operation and uses pictograms. The code should be enclosed within script tags in a single HTML file.
In this game, you control the car using device tilt (tilting your smartphone left or right). The goal is to avoid the randomly generated obstacles and reach higher levels. Each level increases the speed of the car and decreases the gap between obstacles, making it progressively harder.
Note: You need to replace the `background-image` property in the CSS code for the `#car` selector with the appropriate URL of a pictogram representing a car.