In Sink

Very solid co-op puzzle game! There are 10 total levels, and at about an hour each they are perfect for a single sitting. Thankfully no story or dialogue to get in the way, just fun observation and communication based puzzles. The variety between each of the puzzles is very good, even though the mechanics of several puzzles are centered around describing pixel grids of shapes there usually is only a few instances of those per stage. The difficulty very slightly increases over the course of the game but my favorite puzzle was the final one of the stage just before the end credits so it is worth seeing all the way through.

There is a lot to love here, the levels are very charming with the range of themes, and the variety of puzzles is pretty good. Some puzzles suffered from not having enough bits of logic to actually reason away incorrect answers - so sometimes you just have to try a solution to see that it doesn't work - but most puzzles did not have this issue.

A charming little game full of properly well-thought puzzles. The co-op experience is flawless; I have not experienced any lag or crashes after playing this game for roughly 20 hours. My only criticisms are that some of the puzzles take too long to retry (for example, when you have to re-type the whole pattern you have already solved just because you haven't been fast enough to push the button - to combat this, there could have been a paste button of sorts), and some puzzles' difficulty were only increased the by making them tediously longer instead of harder to solve.

This to me is hands down the best puzzle game out there.
Each level (10 in total) offers unique puzzles that you have to complete with a friend where you also need good communication skills because there will be times where you are split and have to tell your partner a piece of the solution.
Had 14 hours of great fun with one of my friends so I recommend this game to everyone liking puzzles and occasionally shouting at your friend.

Oh and also - there is a secret which is always a plus

This game is a great coop escape room puzzler! Also bonus cred for adding new maps when you technically don't have to, since the base game is decent entertainment as it is. I already reinstalled the game twice now for new content.

CIA used to waterboard their captives. Now they found an even worse method of torture: level 7 of this game

A solid 10/10 game for us! There's 10 levels I believe, which are about an hour long each. It was perfect because we went through a level each time we wanted to play and it wasn't too long or too short. I got to play this with my partner and we both had a blast. I mistakenly thought this game was something else when we got into it, so I was pleasantly suprised when it turned out to be what is was. Reminds me of the We Were Here series which is one of our favorite co-op series of all time.
I looked at the reviews in the middle of us playing and was concerned at some of the negative ones, especially since it seems a lot of people didn't like the later levels, but we never felt like that. The later levels actually ended up being my favorites. The other criticism I saw was that the symbols get repeated in multiple levels, but that made it easier for us since we had named them already. I was able to communicate which one I was talking about without struggle, saving us a lot of frustration.
I really liked that there were situations where we were seperated and had to use communication to solve a puzzle, but then others where we were both working on the same puzzle right next to each other. It had a good variety of both and felt refreshing as we played.