https://abisfadon.github.io/threejs-example/dist/
It’s demo shows a work with raycast, ui components and a list of objects in scene. In left-bottom corner you can see a list of available 3d objects. If you want to add a object into scene - use dragndrop feature. When you added a object into scene, you also can move this object by the scene. In right-top corner you will see the details of object what you added. The same you can see if press a right mouse button on any object what you added to the scene. This popup will move with you camera if you want to rotate or resize the scene. In this popup you can change a value of parameters of the object or delete it. In left-top corner a small menu for open/save the scene into yours local storage or file system.
Sure, this project hasn't enough data and should be better, and in one day it will be more cool. It's my best of progress during 2 days :) hopefully you will find something interesting!

yep will be better to use 3d model instead of these simple objects - but I created a option to save your future universe as file and in your browser as well