Sure, here's how you can create a simple Pac-Man game using JavaScript within a single HTML file:
This HTML file defines a Pac-Man game where you can control the movement of Pac-Man using the arrow keys. The game consists of a maze (defined using a 2D array) and the Pac-Man character. Pac-Man's mouth opens and closes as it moves, giving it the classic Pac-Man appearance. You can run this HTML file on a smartphone within a browser to play the game.