Sure! Here's an example of a simple Block Breaker game implemented as a single HTML file using JavaScript:
This code defines a simple Block Breaker game where you control a paddle to bounce a ball and break blocks. You can control the paddle's movement using the arrow keys on a smartphone browser. The game ends when the ball hits the bottom wall without being caught by the paddle.
Note that this is a basic implementation and you can enhance the game with additional features like multiple levels, power-ups, and more.