Sure, here's an example of a Pac-Man game implemented as a single HTML file using JavaScript and enclosed in script tags:
In this example, the Pac-Man game is displayed on a black background within the `<div id="game">` element. The Pac-Man character is represented by a div with the class "pacman" and is initially positioned at the top-left corner of the game area.
The player can control Pac-Man's movement using the arrow keys on a smartphone. When the arrow keys are pressed, the `keydown` event listener handles the movement logic and updates the position of Pac-Man accordingly. The `translate()` CSS function is used to move Pac-Man smoothly across the screen.
Note that you'll need to replace the URL in `background-image` with a valid path to the Pac-Man image you'd like to use.