Sure! Here's a simple racing game implemented as a single HTML file:
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In this racing game, you control a player (represented by a car emoji) using the left (37) and right (39) arrow keys on your smartphone. The AI opponent (also represented by a car emoji) automatically moves randomly left or right.
The goal is to reach the top of the screen before the AI does. If you reach the top first, you win. If the AI reaches the bottom, you lose. The game checks the winner every 100 milliseconds.
Please note that this is a simple demonstration, and you can enhance the game by adding more features, responsive design for different screen sizes, better AI logic, and optimized controls for smartphone devices.