Sure! Here's a basic implementation of the Pac-Man game with a mega fruit power-up and the ability to squash ghosts. The game is designed to be played on smartphones and uses simple pictograms for visual representation.
To play the game, simply copy and paste the above code into a single HTML file and open it in any modern web browser. You can control Pac-Man's movement on a smartphone by dragging your finger on the screen. Squash the ghosts when you have the mega fruit power-up, and avoid them otherwise. The game keeps track of your score, and if you collide with a ghost without the mega fruit power-up, it will be game over.