For a short demo or WIP this looks really great! And it looks like something I would have loved to play, which makes me sad there isn't more here. For what is here, it feels great. Being able to place the 3D objects on a rotating asteroid feels surprisingly natural. I liked the asteroid rotating slowly so you would need to have the collectors in different places to harvest sunlight. This is a really cool design space, I hope you continue to work on something like this!
As others have said, I don't think I saw the theme here at all, but still it looks really neat!