If this really your first CS, you have good idea.... Work on this map more and the CS is will be longer.
Maybe I do not play full CS but, I'm flunk out of map on the long hall and I don't have a key to next.
I found lot of bugs, I'll now show it here.
Door frame texture is not on 2nd side:
Door bug
And the library is high, edit it for smaller version:
Library bug
(And more but no that scaryes)
I know, this is your first CS, I have too lot of bugs.
Scary level: 6/10
Idk, but I must go to next level....
So, gj and repair the bugs.