Sure! Here's an example of a simple platformer game featuring Mario, implemented as a single HTML file:
In this game, you can use the arrow keys on your smartphone to move Mario left and right. Pressing the up arrow key makes Mario jump. The game includes two green pipes as platforms and two purple man-eating plants. Mario can move left and right on the ground and jump over the plants.
Please note that this is a simple implementation and can be expanded upon to create a more complex and enjoyable game.