I think it has a lot of potential, and with those features (in video) already implemented, I think they can overcome SE very easily. What do you think about it?
Honestly, considering the similarities, I’d rather wait for SE’s robust modding community to come up with something in this vein than pay for another standalone Space-Craft.
While you’re right about the galaxy and maybe oxygen portion of this, a planet or planetoid would not be impossible or even improbable.
Mod in two soft variants of rock, likely Dirt and Dirt With Grass
Spawn massive asteroid, made of dirt/rock/resources with spherical gravity pulling everything at the surface and a bit beyond towards the planet.
Bit more advanced modding incorporating a sort of soft “shell” of clouds or what have you around the asteroid, potentially functioning off a similar system to the spherical grav generator, but with no physical effect on the player
Make shell appear blue/green/red/orange/whatever from the Planetside view, and look white/clear from the extra-planetary view.
The bonus portion on this is that you do not wind up with a flat “planet map” but a full planet in 3d space. You could even work out a method of rotation, if you really wanted to.