This has the potential to be a fun game, but the problem is that it takes far too long to build up to anything. This is fine for the first few sections of the corridor, but after a while it just gets a bit too repetitive to remain fun and the tension starts to disperse once the instructions start to repeat themselves. I think if you added a bit more obstacles to the corridor, even something like a flickering light or a sudden blackout (where all you have to guide you now is noise), that would add something to help keep a player's interest.