Sure! Here's an example of a basic open world role-playing game set in the Wild West, using 8-bit graphics and cowboy sprites. It's a single HTML file with JavaScript enclosed in script tags:
Note: In the above code, I assume you have an `emozi_himawari.png` image file that represents the cowboy sprite. Also, remember to replace the `emozi_cat.png` source with the actual path to your sprite image.