The strength of your game is definetly the atmosphere. On my first playtrough i really freaked out by the Boogeyman and by the parents of the player character. There are so much detail and love put in the pixel art, it is unbelivable.
However i missed the theme in the general gameplay. I understand the connection to annie, but that was only shown to me through the plot.
Overall i think this is a pretty good and creepy game. Great work.