Sure! Here's a simple implementation of a Pac-Man game using JavaScript, enclosed in script tags within a single HTML file for smartphone operation:
In this game, Pac-Man can be controlled using the arrow keys on the smartphone. The Pac-Man character is represented by a yellow circle ("pacman" class) that moves within the game board. The game board is a square with a black border. The initial position of Pac-Man is (0, 0) at the top-left corner, and it moves at a speed of 4 pixels per keypress.
Please note that this is a simplified version and does not include complete game logic or interactions with other elements, such as ghosts or food. However, it should give you a starting point for developing a more complete Pac-Man game.