That'd be because you posted before you could have possibly watched the video.yesjam said:well...uh...apparently the mods didnt like that I simply said "great review" in my original post...so let me expand.
I agree with your final analogy re: cherries/sawdust. Couldn't have said it better myself. Particularly in the middle third of the game, the exploration sequences get really dodgy. I appreciate some exploration in games (eg. Metroid) but this was way too over-the-top for Portal. My other criticism is that some of the puzzles seemed a bit too reliant on "luck" for me. But thats all. I would give it a 9/10