This is my new game called Doppelganger. This was my first attempt at a horror game, it was made with unity. You are inside a sort of maze like building being chased by your doppelganger. You need to get three keys to unlock the door.
You can play it online here: http://www.kongregate.com/games/The_Ryan/doppelg-nger?acomplete=doppelga
Or download it for higher quality and full screen here: https://www.dropbox.com/s/avqe6hqnxzcr7ef/DoppelGanger.rar
(or just get the attachment on this post)