Nice!
It has some flaws, like the candle, which would make cool lighting effects, but the room looks always very bright. Already pointed out by others, what is the reason the protagonist is in this museum? A short pre-story like a chase from a gang in the rain with an escape to that museum would have helped. And from the moment where she sees the fatal portrait, the scene cuts could have been even quicker, for example just the fraction of the second where the mouth blows out the candle. Would have been an even more shocking ending.
But still: nice!