Timur310/PixelPlanets ? reverse-engineered prompt

Build me a browser based pixel planet generator in JavaScript with Three.js, like a little interactive toy where I can create and preview procedural planets on the fly.

I want the planet made from separate visual layers so things like land, water, clouds, rings, atmosphere, and other details can be mixed and adjusted easily. Please include a few preset planet styles I can click through and tweak with a simple on screen control panel, so I can play around with colors, size, rotation, and other obvious settings.

Also add a nice space background generator behind the planet, so the whole thing feels polished and usable for screenshots or sharing. Keep it lightweight and easy to run in the browser, and make the main demo page the focus. If you need to look up current docs online for anything, go ahead.