I was honestly very excited when I first heard of this title. Sadly, it didn't really live up to expectations.
Not that it's a BAD game, it's just not coherent - and that breaks the immersion and atmosphere, which is a shame: this game would otherwise really do a great job in creating a haunting experience.
One example: roughly a few minutes into the game, after the impact, you find your oxygen levels are dropping dramatically due to a leak. After running to an oxygen tank, you will be able to fill up (and magically fix the leak) and be left with an autonomy of approx 8 hours.
Shortly after that you will find your way to the Russian town where, among other things, you'll find another oxygen tank. Remember where it is, because you are likely going to use it more than once, as oxygen will run out within minutes and you'll have to track your steps back to it quite often until you unlock the next zone - which is where the incoherence is: for most of the game your oxygen will last you days, with the exception of a few areas. You can argue that, as the game has cutscenes, our little astronaut will have filled up in the lapse of time we weren't in control of him for - but there are plenty of areas you'll be roaming for a relatively long time without a worry.
This may sound like a really minor thing to complain about, but it's one of many the immersion suffers from.
Another aspect that feels often unnatural is that of puzzles: more times than not, the puzzles will feel completely irrelevant - you can safely pick up the green stones with your hands, but you NEED the robotic arm to place them in a slot roughly at the same height as your head, triggering a mini game. When you feel you might actually have found a use for the arm it won't be available for use, as it's only triggered when close to an object it is designed to interact with.
The puzzles overall are never overly challenging, with the game mainly focusing on jumping, and simply feel out of place - situations that require you to interact with objects to actually clear a path are scarce, and when you do come up with a clever idea, the game just won't cooperate with you.
As for the story, it was one of the aspects that kept me playing the game for most of it's (short) length - it starts with an intriguing premise but loses it's strength in the later chapters.
The game's strength is mostly, if not completely, in its haunting sound effects and soundtrack, which alone manage to give the experience an incredible depth, but strip those from the game and there won't be much else left to shine (mission objects aside).
Overall, I'd still recommend this if you can overlook it's flaws - the story is not the worst I've played and is not without surprises, and the sound department tries hard to make up for most of what the game lacks in mechanics.