Funniest game I've ever played!
This game is the funniest one I've ever played. The whole love-hate relationship with the ever present female computer voice is extremely well done and really drives the story (yep, there is a story, a pity it's that short)! The end and closing titles song is hilarious and very satisfying (cake! finally)!
The game play is easy to understand, with a perfect learning curve (as expected from a Valve game). The puzzles in the main game don't get extremely difficult, so you won't be struggling for hours over a single puzzle. Plus: it's highly addictive!
I would recommend this game to everyone, it's a classic in the make!