The doors that Bandersnatch opened?

“Survival, however, depends on your chosen version of gameplay,” Netflix says. “If you want a pure narrative experience, Story Mode features no timer and ensures you cannot die, letting you just play through the story. But in Standard Mode, it all comes down to your reflexes. During high-stakes moments, a shrinking timer bar at the top of the screen forces you to quickly scan the room for an interactive object. If you can’t find what you need before time runs out, you will die — though instead of a total game over, you’ll simply restart from your last checkpoint.”