Sure! Here's a simple example of a 3D spinning donut game implemented as a single HTML file using JavaScript. It includes a donut pictogram and can be played on a smartphone:
When you open this HTML file on a smartphone, you will see a 3D spinning donut that continuously rotates on the screen. The donut is represented using a donut-shaped circle and a donut pictogram (🍩) placed inside it.
You can interact with the donut by tapping or swiping on your smartphone's screen. However, since this is a simple example, there are no specific game mechanics or objectives implemented. It's more of an interactive animation than a full-fledged game. Feel free to enhance it further based on your specific requirements and game mechanics.