Unfortunately the puzzles in the game are not very well constructed. The idea of the game is great, but the puzzles (outside of the challenge mode) can be all completed on auto-pilot,
Also a warning: a portion of the game is in very harsh deep black - pure white shades, and it can be really tiring on eyes. Play this in a bright room.
i went into this expecting more puzzles and was disappointed. the game is on the shorter side. The game was nice to look at and the illusions were all interesting and creative. I completed it in about 2.5- 3 hours. there are a few good puzzles. Some perspective/puzzle mechanics aren't explained very well or at all and took a some trial and error to figure out what i could move and do. This was more like a more linear Stanley parable with a few puzzles mixed in. There is light exploration and lots of walking with occasional humorous narration. the story wasn't great in my opinion. If you go into it expecting this type of game then perhaps you will enjoy it more than i did.
The idea of a perspective based puzzle solving game is unique and pretty cool. It was fun for a while to play around with the perspective. After the initial wow factor, most the puzzles were kinda boring to solve. Some were just downright annoying - especially the one with the misleading exit sign where you have to move in opposite direction of the exit sign. That puzzle mechanic had nothing to do with the prior established perspective mechanic.
There was one puzzle that stood out that I found very enjoyable, and that was the one involving the house in the swimming pool. This particular puzzle made good use of the perspective mechanic. It was damn cool. Too bad there wasn't more of it.
Of the puzzle games I've played, I rank this one in the bottom half, despite its cool idea. Portal 1 and 2 are my favorite for story + puzzle mechanic. I love Talos Principle for the story, and the puzzles are good too. Turing test has decent story and puzzles. Antichamber was just weird. Superliminal ranks somewhere between Turing Test and Antichamber. I guess I have a preference for consistent, logical (as in the game sticks to its internal logic), well-explained puzzle mechanics over weird and random anti-logic type puzzles. Superliminal seemed like it was going for a consistent and logical perspective-based puzzle mechanic, but ended up feeling weird and random like Antichamber. Come to think of it, Superliminal started to feel a bit like Stanley Parable towards the end, and Stanley Parable isn't even a puzzle game - it's a parady game where the mechanics deliberately don't make sense.
Overall, good idea, good initial impression, a few good puzzles, but got weird and boring halfway through.
What a wonderful reality shifting perception changing game. Dark. Amazing music. Stanleys Parable meets Twin Peaks meets Puzzle Game. Not too long. Not too short. My kinda stuff.