What I know about MirrorMoon can be pretty much summed up in a single phrase, which is on the game’s main screen when you boot it up: it’s a “recursive space mystery”. I don’t even know what that means, which is no surprise given that I don’t know what I’m doing, where I’m doing it, or even whether I’m doing it. But here’s a picture of a planet I found with some sort of funky swirling thing going on. It seems like it’s this planet’s version of weather.
The basic concept — I have no idea if this constitutes a spoiler, because I have no idea whether there’s anything deeper down this inscrutable galactic rabbit hole — is that you fly a ship with unlabeled controls to a planet, where a hovering miniature version of the planet serves as a map/control panel, which you then use to activate something to let you do something that somehow involves going to other planets something something something. I think the miniature planet map (a mirror moon, perhaps?) is the recursive part of the game. Everything else is the space mystery.
MirrorMoon is available now on Steam. Let me know if you figure it out.