It was a bit creepy, something cynical, something devious waiting under the mask.
The instrument choice in this one was quite exceptional.
The intro was very well built, I would get the piano sounds a bit deeper. Either go very deep, or very high, I feel those two extremes would make it sound better.
Also rather then the plucking noises, if you used some string sounds, it would make it darker, as that noise gave it a happy sense to it.
Also the ending was a bit too abrupt.
Overal though, I liked it quite a bit.