The map's architecture

[Prelauncher]

Rainy Hall and the big door in the Entrance hall

Is this true though? The Entrance Hall door, in my opinion, would be the exit and the Rainy Hall one would be...something. -.-

Isn't the door in the Entrance Hall opened in one if the endings? Daniel walks towards it as light shine through the opened door, daylight, and not as it would if it led to the Rainy Hall.