I'm not entirely positive what one is supposed to do, but there were a few issues.
Firstly, starting up, I hesitated at the doorway, the trigger occurred early, and I was dropped into the void because the room shifted/unloaded too quickly.
Secondly, in the initial room, moving back and forth, the actual points were somewhat jittery, with the box teleporting back and forth, but the door only doing so sometimes. And it didn't matter if you actually entered the box. Going around it, the trigger was wide enough to trigger anyway.
I could not locate an alternate path or a way out, I tried interacting with every spot on the wall and jumping around.
The AI's voice commentary wasn't super clear at the far end of his statement.
The reflection in the floor, though pretty, could see the player character and the signs movement to face the camera.
I sympathize with a submission running into unexpected errors, and I apologize if there was some step I missed, but unfortunately it did give me the path to do much aside from see my own arms, tire, and self in the floor.
I'm also not sure if its based on my system or what. I know I was having VSync issues because of my monitor, but there were no settings I could tinker with.
Best of luck.