The atmosphere is nice, and got me nervous. The ones following you do a great job, i bump into one all of a sudden and got me jumping haha. I agree with the other comment, i found the key, and found a door asking for a key. But there's no clear controls on how to get it or if that's the key that must be taken. Maybe adding some clear controls would help too. Also crouching with spacebar felt a little odd to me. But above all, it's a really nice game!