Sure! Here's an example of a simple Pac-Man game implemented as a single HTML file using JavaScript:
This example creates a simple Pac-Man game where the player can control Pac-Man's position on the canvas using touch events on a smartphone. Pac-Man is represented by a yellow circle and can be moved around by dragging on the canvas. The game loop updates the game logic and redraws the canvas 60 times per second. Note that this is a basic implementation and doesn't include features such as enemy ghosts or maze layout. Feel free to extend and improve upon it based on your requirements.