As a biology nut, I know that rats don't really like cheese. However, I happen to love cheese and the factoids at the end of each level were my favorite part. 5/5
I love the improvements this game makes over the previous one! Especially the shorter time between availability of hints.
Although I have to chuckle a bit realizing that I created and populated an entire world, not only with humans before dinosaurs, but with no sun.
I got to level 37 and spent about ten minutes just staring at it going WHAT IS THIS I DON'T EVEN. When I finally got over it, it took about twenty seconds to solve. >.> This game. It's just... Awesome...
Some of the puzzles were difficult, but not so much that I needed the walkthrough. The dialogue was very amusing, especially the parts that only showed if you stayed in the room longer than necessary. 5/5
Sorry, I guess I gave the wrong impression about my thoughts on the game in my previous comment. I did not mean to imply that I actually thought this had anything to do with Valve. My impression is that it was INFLUENCED heavily by the creator's experience playing Portal, and my intent was an amusing over-analysis, like some people do for fanfictions.
Well, no matter. It's still a fun game.
My conclusion based on this game:
This entire game is the Rat Man's delusion which he sinks into to psychologically compensate for the loss of his beloved Companion Cube due to its incineration by Chell. In this delusion, before the Companion Cube died, it somehow had a child (this doesn't have to actually be possible, seeing as the Rat Man is crazy). That child is Quoosh. And now the Rat Man must spend the rest of demented eternity testing Quoosh GLaDOS-style.
One of the music pieces for "When the Saints Go Marching In" is missing. Everything else is in the right place, but I can't find the last music piece anywhere on the screen. Does anybody else have this problem?
So... One of the trombones sounds like a flute, one sounds like a trombone and one... I'm not even sure what.
Yankee Doodle will never be the same to me again.
 "Lab Rat: Quest for Cheese"){kind=icon}
 "Pandemic 2"){kind=icon}
 "Doodle God 2"){kind=icon}
 "Doodle God"){kind=icon}
 "Electric Box 2"){kind=icon}
 "Rebuild 2"){kind=icon}
 "The Man with the Invisible Trousers"){kind=icon}
 "Moon Waltz"){kind=icon}
 "You Find Yourself In A Room"){kind=icon}
 "Qoosh"){kind=icon}
 "light-Bot"){kind=icon}
 "Lab of the Dead"){kind=icon}
 "Haunt the House"){kind=icon}
 "Picma"){kind=icon}
 "NoNoSparks: Genesis"){kind=icon}
 "Musaic Box"){kind=icon}
This game was not developed nor is endorsed by Valve.