I just finish (started friday) and even though I felt like throwing the computer across the room a couple times, because of some puzzles I thought where impossible but was actually the easiest, I have to say this is an awsome game, I loved all of it! I hope there is more to come!
The only problem I had was not being able to figure out some puzzles from the lack of sleep. I also over thinked a puzzle on how it should be solved or I would do part of the puzzle with out realizing it and not go finish it off, instead I would change the part that I finished so if I happened to go to the other part I couldn't do it.
I admit I had to get some clues and I thank all you who posted hints but the majority of the puzzles I figured out myself. I actually finished Ep. 2 & 3 with out any hints.
Just wanted to say again I LOVED the game! I wish it was all together like each episode is one level, then I wouldn't have had to wait for each one to download.