A pretty scary game. You've nailed the whole dark atmosphere by making everything super dark and suspicious enough that the player has to keep guessing what's happening next. And I absolutely loved how the red light switches' image was subtly placed into the players' minds and they don't expect the extra one at the end to be the monster itself.
It is a great game which gets everything a ten on ten, which is a checkpoint, the environment, the monster emerging and even the maze thing at the end. The only thing I found lacking was the story, maybe adding more to a story behind why there is blood everywhere or everything is wrecked or why there is a monster would make the game perfect. If there was a story, I might have missed it, sorry about that.
But all in all, a great game to play and loved going through it! Keep up the great work and good luck!