This map looks and sounds incredible, but there are many things that could be improved upon, such as telling the player(s) what they need to do in each level, and making the things that they need to do easy to spot at least when they are in the same room, such as in other maps where intractable items have a bluish glow around them. My friend and I spent hours on the first chapter, and explored the entire thing, and couldn't find anything we were supposed to do.
Good, BUT