Sure! Here's a simple 3D solar system game implemented as a single HTML file using JavaScript:
When you open the HTML file in a web browser, it will display a canvas with a representation of the solar system. The sun is depicted as a yellow circle at the center, and there are four planets (Mercury, Venus, Earth, and Mars) orbiting around it. Each planet is represented by a different color circle, and they move at different speeds and distances from the sun.
You can view and interact with the solar system game on your smartphone by opening the HTML file (which contains the entire game) in a mobile web browser. No need to reply. Have fun playing!