I like it!
Although it feels more like an intro to something than a complete piece, the colourless style and overall eerie atmosphere was really nice. By the way, right now it's night here and I'm sitting alone next to a window, so thanks, really… :)
Perhaps scarier than the monster was hearing the voice for the first time, because it's quite louder than the initial background music, so it caught me by surprise.
Bottom line, it's interesting and I hope to see more.