Sure, I can help you create a simple Pac-Man game using JavaScript enclosed within HTML script tags. Here is an example implementation that you can try:
To play the game:
1. Copy the entire code above and save it as a single HTML file (e.g., `pacman.html`).
2. Open the HTML file using a web browser on your smartphone.
3. Use the arrow keys on your smartphone keyboard or virtual arrow buttons to control Pac-Man's movement.
4. The objective of the game is to navigate Pac-Man across the grid, devouring all the white food dots to increase your score.
Note: This implementation is a very basic version of Pac-Man and does not include complex game mechanics, levels, or ghosts' behaviors. It's more of a starting point to give you an idea of how to create a simple game. Feel free to enhance and modify it according to your needs.