Great atmosphere and nice animations! It was quick and simple, but I enjoyed it. You could kind of easily jump over the "dogs" pretty easily and just run to the end which took a bit of tension away. But that's just looking for a quick way to play through I know.
I had trouble seeing the ladders except for in between the floors, especially in the html5 version where I couldn't see them at all. I could barely make them out when I tried downloading.
Overall a really neat idea and a good job interpreting the episode! Great job!