Awesome puzzle game with a great atmosphere achieved with really minimalist design. You took a few elements really far to make it feel like a horror game from just a few sounds and interesting choices of texture, and the intro text going with the tutorial. Also the tutorial was great at introducing the game and being super easy to pick up and understand.
That being said, I wasn't a fan of the arrow keys being the way to navigate between levels, making my hand jump off the mouse to reach them, or moving my hand from Q/E rotation to the arrows. I think an instant-click to switch maps would have allowed me to play a lot further. I got 1138 but was dying because I had to fumble through the map to find where I needed to fix stuff. This definitely added to the feeling of overload, however!
Really liked this entry, a solid and well-developed concept. I especially appreciate the time put into the tutorial phase. Great work!