Review greatly shortened due to length constraints
I just can't think of this game as a platfomer. There are no death traps, no enemies to avoid, no coins or baubles to collect... it's simply an adventure game that happens to have some platforms in it.
You hold a "swapping" device in your hands that has two abilities: First is the duplicate function. What this does is create exact replicas of you, and your replica(s) will mimic every move you make. You can have up to four duplicates at any given time. If they "die" you can create another to take its place, and when your duplicates touch you, they disappear, allowing you to make another. Second is the "swapping" beam. Zap any of your replicas with this beam to have your consciousness transferred to that body. The swapping beam has one more function, and I mention it only because I got completely stuck, having NO idea you could do this: If you are in freefall, you can use the beam to "push" yourself through space.
The game progresses through a series of puzzles based upon these abilities. There are obstacles in that the swapping device reacts differently around colored lights. For instance, you can create a duplicate within red light, but your swapping beam is completely blocked by the red. The opposite holds true within blue light, and so on.
The music sets the tone so beautifully, so perfectly, that you don't really notice it at first. Never distracting, I was more than once surprised to realize that not only was it was there, that it was lovely to listen to, as well. "Lovely?" you ask, "In an atmospheric psychological horror?" To that I say, "Absolutely!" Just go with it, you'll see what I mean when you play The voices are done incredibly well, never feeling stilted or out-of-place.
And that brings me to the story, that which binds the whole game together in this richly-woven tapestry. The story progresses in multiple ways. You will occasionally hear voices (... no, not that
kind of "hearing voices"!) as you progress through the game, and, as mentioned, they are very well done. Next up are the terminals, which give you snippets of conversations and orders from the command of this place you're in. Lastly you have the thoughts of... something(s), which I will not give away.
When I first saw the graphics, I thought they looked blurry... fuzzy, even. It's amazing how differently you perceive things when you're actually playing the game yourself, and not just looking at screenshots or a video. Suffice to say that the graphics contribute to the overall feeling of the game. Somehow, The Swapper reminds me of John Carpenter's The Thing. No, there's no parasitic life form trying to assimilate and/or mutilate you, but those feelings... Cold. Alone. Uneasy. It is all of these and more.
This is truly a must-play game for anyone who enjoys a deeply environmental game with a powerful tale to tell... a tale whose full implications I have yet to digest. Better yet, this is a game that can be enjoyed even more upon subsequent play-throughs... And that is something I will be even more happy to do now that I know I missed some of the content my first time through.