Sure! Here's a sample implementation of the Donkey Kong game in a single HTML file:
To play the game, open the HTML file in a smartphone browser. Use the left and right arrow keys (or the respective smartphone controls) to move the player emoji ("👮") left or right on the screen. Avoid the barrels ("🛢️") and reach the top to save Pauline. If you collide with a barrel, you lose the game.
Please note that this is a simple implementation and may lack advanced features or optimizations. You can further enhance the game by adding more levels, obstacles, and power-ups.