The soundtrack has a nice pacing, with the anxious anticipation set by Big Ben moving to the happier mood of the following tracks.
I was surprised by the 4 on the floor of the 4th track, but it makes sense because it's the moment in which things start to get troublesome, but the happy mood has not been completely destroyed, which happens on the 5th track.
The rest of the story also makes a lot of sense, the 6th track creates the perfect tension for a final battle, and then the piano to resolve everything and give a feeling of closure.
Beautiful and solid OST!