Sure! Here's a simple Mario game implemented as a single HTML file using JavaScript:
This code sets up a Mario game where you control Mario using the arrow keys on a smartphone. The Mario character is represented by a div with a background image, and its position is adjusted based on key presses. Feel free to customize the code further to add more game mechanics or improve the visuals. You can also replace `emozi_all/mario.png` in the CSS with your own pictogram for the Mario character.