Thank you guys for the kind words.
I would be happy to share anything I made so far. My user interface is made completely with Blueprints. When I started I was planning to ignore Blueprint since I was very sceptical towards visual scripting but somehow I fell in love with it. Now, everything except the rigid body stuff is made with blueprints. So, if you are interested I can simply send your the blueprints that make up the user interface. That would be my custom PlayerController class, my HUD class and a few Interface Blueprints.
I could also write a small tutorial explaining the features with a few simplified examples. Or a combination of both…
PS: Your solar system simulator is really cool. Are all the planetary movements to scale? I never imagined planets are rotating that fast. I also like the custom sound effects for every planet and your sun material really looks like a hot ball of gas.