Sure, here's an example of a simple Block Breaker game implemented as a single HTML file with JavaScript enclosed in `` tags:
<br><br>
<br>
<style>
canvas {
border: 1px solid black;
display: block;
margin: 0 auto;
}
</style>
<canvas id="gameCanvas" width="320" height="480"></canvas>
This game features a ball that bounces off bricks and the paddle at the bottom of the canvas. The goal is to destroy all the bricks by bouncing the ball off the paddle. If the ball misses the paddle and goes out of bounds at the bottom, the game is over. You can control the paddle using the left and right arrow keys.