First half of the game: Thumbs up
Second half of the game: Thumbs down
Welp I quit. I really liked this game when it first started, because I really enjoy first person puzzlers, and in a lot of ways this game is a great one, but it also kinda shoots itself in the face. The different "dimensions" (light, heavy, slow, reverse gravity) make for some really great puzzles and there a lot of puzzle chambers that were genuinely fun to solve and exactly what I expected when I purchased this game. These were the puzzle chambers where you had to use the four dimensions to maneuver blocks in the environment to press buttons, trip lasers, avoid lasers, drop a ball into a net, and other types of things. I remember really enjoying a particular puzzle chamber with a bunch of conveyers, and the trick to it was that you had to use reverse gravity to utilize the UNDER side of the conveyers as well as the top side. That was a fun discovery, and it was fun to execute on when I realized it.
But here is where the game is possibly going to piss you off and possibly make you quit. It is not ENOUGH in quantum conundrum to just solve the puzzle, because this is not just a puzzle game. The further you get into the game, the more the game becomes about physics, timing, and platforming---and in the most annoying way. We're talking about a situation, for just one example, where you have to position three blocks in such a way that they fall onto three conveyors at the same time, and those conveyors (hopefully) drop them onto a fourth conveyor in a (hopefully) straight line, so that they move into position under a gap where you can use reverse gravity to elevate them into a bridge position across the gap, then quickly use slow-time to hold them in position so you can use them as a series of platforms to jump across. BUT WAIT. The opposite side of the gap is blocked by a door that has to be opened with a button, but there is a 3 second delay between the time you press the button and the time the door opens, and the door will ONLY open if slow time is on at the EXACT MOMENT the door would open. So you have to try and figure out the exact timing to press the button, press reverse gravity, then press slow time. Or is it press reverse gravity, THEN press the button, THEN slow time? How much of a pause do I leave between each one? Who knows? Good look setting up the solution 50 times until you trial-and-error work it out. And then when you finally DO figure out the timing, the game's physics dropped the safes onto the conveyor all sloppy so they're not lined up well, so when you try to execute some crappy first-person-platforming (let's face it: FPS platforming is always kinda crappy) across them, you miss the third safe and have to set it all up AGAIN. And again. And again. This all gets very f***ing tedious and sometimes even feels like there is an element of luck to it (i.e. how the physics works out), which is not a good situation.
Also, the professor or whoever talking to you over the intercom talks way too much, and it's sort of painful to listen to how much he tries to be funny but just isn't really. (Sorry, writers.) And his constant blabbering sort of ruins the atmosphere. For a dramatic improvement to atmosphere and experience, do yourself a favor. OPTIONS -> AUDIO SETTINGS -> DIALOGUE VOLUME -> turn it all the way down to zero to shut him up forever.
At the end of the day, it's a really great puzzle game that could have been a real classic, but its annoying habit of ruining its puzzles with physics that are beyond your control, first-person platforming too demanding for a puzzle game (FPS platforming is rarely a good idea as it is), and requiring a series of actions to be executed in a specific sequence with incredibly specific timing----it all just increasingly ruins the puzzles as each new chamber ratchets up the demands on the player in these areas. It wouldn't be so irritating if you didn't have to go fetch and reposition a bunch of blocks into catapults and conveyors and springs etc every time you failed one of the requirements (i.e. failed timing, or failed a jump, or else the physics just f***ed you over), but when you get into the later puzzle chambers, you're going to waste a lot of minutes of your life just "reloading" the puzzle chamber setup over and over again. As I said before, this all gets very f***ing tedious.
It's a shame, because this is a really well-made game and there is a lot here to like. I just really wish they wouldn't have pushed so hard on the physics/timing/platforming demands for a game that sells itself on puzzling. In my opinion, they took those aspects overboard and thereby undermined the enjoyment of the puzzling.