My buttcheeks were throughly clenched through my whole playthorugh, I don't know if this is genuinely scary or if I'm just a wimp but either way good job.
An option to skip the dialog at the start would be nice and some more audio cues for the enemies. Just something like footsteps or groans to keep the player on alert and give them a heads up of what might be there, rather than having the player find out when it's too late to fix things