This is a basic implementation of Pac-Man as a single HTML file using JavaScript and enclosed in script tags. The game can be played on a smartphone and uses pictograms represented by filled rectangles to depict the game objects.
In this game, you control Pac-Man using the arrow keys. Pac-Man will move around the canvas, and if he reaches the edge of the canvas, he will wrap around to the opposite side. There is also a ghost that moves at a slower speed. The game constantly updates the game state and renders the game objects to create the illusion of movement.
Please note that this is a minimal implementation and doesn't include features like collisions, score tracking, or game over conditions. However, you can enhance the game by adding these additional functionalities and improving the graphics.