Sure! Here's an example of a side-scrolling Spider-Man game implemented as a single HTML file using JavaScript:
Please note that the above code is a basic implementation and may require additional features and improvements to make it a fully functional game. You can customize and modify it to add more gameplay elements and enhance the user experience. Also, make sure to include the actual `emozi_cat.png` image in the same directory as the HTML file for the player character's appearance.