df_base Gromas Mines add feedback to the player that entering the corridor causes the doors to start closing

[bitcores]

There is little feedback to the player as to what causes the doors to start closing in the exit corridor puzzle. Some kind of visual or audio feedback to the player would help the player grasp that crossing the line into the corridor causes an event.

[bitcores]

When you enter the corridor an alarm will start playing and the ambient light of the doorway will flash, indicating to the player that they have triggered "something". This should make it clear to the player they are somewhere they "shouldn't be" and make clear why the doors start closing upon entering the corridor.