Nova Lands has been released on Steam. It's a Sci-Fi builder with chill music and cute pixel style.
I played the prologue Emilia's Mission, which is sadly not available anymore. :( But I thought the game was really fun.
It has a bit more depth to it than one might think from the looks of it. Since you can optimize the automatization of your crafting processes and use drones to do some work for you. A small warning: you can die in the game from a lack of oxygen and I think if you anger the bees too much they sting you.. a lot .. :D So it's not 100 % friendly.
There is also a game called Lost Nova, by the way, which is also a cute Sci-Fi game which costs a bit less and is not a builder, but an Open World Exploration game.
So don't confuse the two. ( “･ω･ﾞ)