Sure! Here's an example of a simple Block Breaker game implemented as a single HTML file using JavaScript:
This code sets up a simple game canvas and implements the logic for moving a paddle and a ball. The paddle can be controlled by moving the mouse horizontally. The ball bounces off the walls and the paddle.
Note that this is a basic implementation and does not include features like block breaking or scoring. You can extend the game by adding collision detection with blocks and implementing scoring and levels.