Firstly, I want to say that I was quite amused at how you guys squeezed me into the game. Especially when Erica said that it's "Obviously not his real name." She do know me vewwy well, don't she?

Anyway, one thing that I was glad to see was additional ways to die or lose. That was one thing that made episodes 1 - 3 a little too easy. There were very few of them in those episodes and they were pretty easy to avoid, if you have a brain. This time, Erica really has to be on her toes and make careful decisions to avoid getting busted or meeting the Grim Reaper too soon. That sense of urgency is something I enjoy seeing in games.
I won't lie and say the puzzles weren't difficult. They were. But this time they were not only quite clever and well-thought out, but aside from an occasional game hint, I was eventually able to figure them out on my own.
As for the story...
Lastly, I'm afraid I noticed three bugs:
Overall, I give this episode 8.5/10