Sure! Here's an example implementation of a simplified version of Pac-Man game as a single HTML file using JavaScript:
In this example, we have a game board represented by `<div id="game-board"></div>`. Pac-Man is represented by the `.pacman` CSS class with a background image. The `pacmanPosition` variable keeps track of Pac-Man's current position on the game board. The `drawPacman()` function is responsible for drawing Pac-Man on the board at the correct position.
The `handleKeydown()` function handles the keyboard input (arrow keys) and updates Pac-Man's position accordingly. The game will prevent scrolling when the arrow keys are pressed. After updating Pac-Man's position, the previous Pac-Man is removed, and Pac-Man is redrawn at the new position.
The game starts by calling `drawPacman()` to initially draw Pac-Man on the game board. The event listener is added to listen for keyboard input.
Please note that this is a simplified example, and the game logic, including the ghosts and pellets, is not implemented. The provided code is only meant to demonstrate the basic functionality of moving Pac-Man on the game board. You can enhance and extend the game as per your requirements.