I am absolutely blown away, people shouldn't be allowed to make games this good.

Everything about this game is perfect, each planet, all the dialogue, every puzzle is so brilliant, this is easily one of the best games of the decade.
but... why not five stars?
There's three small issues with the game.
First, I wish the game took the time to create more of a bond with the hearthian characters, as it is they just feel like hint machines, which is a shame this feels especially strange with how much reading you have to do, it's all well-written but there doesn't need to be as much of it.
Second, some of the puzzles are just a little bit too esoteric, to the point where I felt annoyed more than triumphant when I figured a couple of them out.
Third, the controls are fantastic, they work perfectly for everything... unless you're playing on mouse and keyboard, in which case you have to grapple with some of the worst controls ever put to a game.

Other than that though this is a powerful, beautiful and expertly crafted sandbox with a really compelling story and lore. This is a must-play for anyone who loves space games, games with fun traversal, puzzle games or story games.
You're doing yourself a disservice not to play this, so get out and do it, but for the love of god please use a controller.