This game was the best Portal mod I have ever played. I loved how you espcially got to use the paint gun! Though, there are bad and good things about the game including but not limited to...
-The paint gun made the game so much fun, especially if you liked using the gels from Portal 2
-They have a community workshop, so just like Portal 2, you can create your own maps and post them up to the workshop with new creation tools.
-The story line was actually pretty good, short, but fun! :)
Now the rest of my opinions on the game involve the cons section. There will be quite a bit here...
-The paint gun, like I said, made the tests way too easy
-The voice acting was terrible! No offense to the voice actor, but the voice for "Nigel", the new core, was really just aggravating in my opinion.
-Sometimes (atleast for me) when the repulsion gel is out and you stay on it for a certain amout of time you jump randomly.
-The paint gun in my opinion is fat and ugly (lol). I personally liked the paint gun from when this game was still on greenlight and the gun had a long tube in the front. (One of the trailers on the store page shows you the image of the old paint gun)
-Some chambers were outright dull and boring
-A majority of the chambers from the beginning of the game were way too brief. (Ex: [Spoilers] When Nigel says that this test chamber will be hard [beginning of game], it really wasn't. It was easy a brief)
-Sometimes when shooting the gels, they don't respond (Again, for example [Spoilers] when you escape the Aperture Science Labratories, there are fun obsticals that require you to be fast when using Propulsion and the repulsion gel, but when they don't respond quick enough for you to surpass, you... well die. Oh, and you have 50 seconds to escape c:)
That's about it. Though, the game had a lot of cons (in my opinion) and were just so boring at moments, it was still a fun game using the paint gun and all. And that's why I still recommend this game. Plus, remember you can post chambers you created on the workshop just like Portal 2!
7/10 (IN MY OPINION)