Yes, it sounds dark, but it sounds like a mysterious library. I love the sound of turning pages.
Very nice use of reverb and stereo.
A little downside though, you put the piano sound on the left and it sounds great when it's in the mid and high range. On the other hand, when that leaves in the low register on the end and that the piano doubles the bass, I find that the stereo is unbalanced. This is only my opinion, but I have the impression that even with a wide stereo, it is better to keep the bass as centered as possible. What do you think about it ?
I also really like the counterpoint of the glockenspiel, it complements the piano wonderfully.