Damn, short and effective. The audio scares were great and the use of the mist was a great choice! The scares of this game were of the highest quality, as they were not "cheap" and "right in your face", but instead subtle and mysterious! The graphics and game mechanics were good too, but the design and attention to detail is what really made the visuals shine. The bodies and unnecessary yet very immersive details really make you feel like you are actually present.
The car driving around is and odd choice as it is a bit rugged, but does work as a disturbing factor for the game. Perhaps, it would work better if it was a little more natural in it's driving patterns, or perhaps it would chase you, to the best of it's ability of course, as it is in a very small are.
Other than that, there is nothing much to add to the gameplay itself. Great quality overall! But as you said, the game would really be improved as a whole if the gameplay was extended. I would personally really like to see a chase sequence in the future! Maybe you go through a door, and find yourself in an impossible long hallway, looking much like the interior of the parking cellar. You hear a roaring noise, like the sound of and engine! You look in the direction of the noise, and find yourself blinded by sharp headlights bursting to life. It screeches as it accelerates towards you, and you look for the door in a panic, but as you turn around it is gone. There is nothing but the wall of the rest of the hallway. There is only one choice, run for your life or face certain doom!
Anyway, that is just my take on the game, I really enjoyed it and hope to see an extended version in the near or distant future! Great work!
-BH