you need to take off adBlockplus for this site :/
Weird, because a couple of months ago, I think muddy heights did work with it. I did find the second room with a interactive door confusing, given the fact that when I went through the process of going in and out of both directions to trigger a different room it's like the end is shortened and is a dead end.
By the way, is it normal for the game to go into another areas when I crawl to the right side of the room with the door at the end that automatically closes?