Interesting game, I liked the sound effects you used and the music was pretty scary, but there were some bugs like sometimes I couldn't unlock a door, and the keypad doesn't do anything, but other than that it's a pretty good game.
Thnx for playing ! To unlock the door , you need to read all the text(by hovering the cursor over the walls) going forward... And then come back to the door to unlock it. I hope that helps, try playing it again if you got time... There's much more interesting thing awaiting after that!