Sure! Here's an example of an Atari Pong game implemented as a single HTML file, using JavaScript and enclosed in script tags. In this version, instead of a regular ball, we'll use a spikeball that moves automatically. Please note that recreating the full Pong game experience might not be possible in a single HTML file, but this example will provide a basic game structure:
In this game, you can control the player paddle's position by moving the mouse within the game canvas. The spikeball will automatically move in a diagonal pattern, bouncing off the walls and the paddle. If the spikeball passes the player's paddle, it's game over, and an alert message will be displayed. To restart the game, simply close the alert dialog.