I just tried the game longer today, I think there is a problem and bug with the part where you supposed to listen to the four telephone. Last door with the Valve doesn't open properly, I only managed to open half of it. Also I don't know if this is a bug. The same map, I can listen to the first telephone "What do you want from me?" telephone repeately to open the Church/Gyneocologist Room without the need to listen to the other three telephone. Anyways, the annoying part of the game is probably the Plattform jumping part with the baby beds