Overall, this is an awesome map! The only problem I had with it is when you're crawling through the tunnel (taking the same path that's near the white skull) only to reach the end of the tunnel to find a dead end and death by means that shan't be explained.
Also, after a while, my fear is replaced with frustration of not being able to open either of those locked doors.
Where the f**k is that f**king battery?!