Simple concept stylishly executed.
Even from the loading screen, it's apparent that this is something a little different, a little more stylish perhaps, than most.
Of course, I have been disappointed by poor movies following great preloaders before, but it's always nice to have a quality creation through and through.
The disappearing 'play' button looks swanky (although the suddenly disappearing credit less so, but that was only noticed on 3rd viewing).
The fbf outlines figures are simple but effective both in differenciating themselves from the normal filled figures seen so often (thanks to the pleasingly shaky fbf and lack of fill) and in looking like authentic human beings.
I love the way the 'light' of the doorway disappears as well.
You use instances to good effect and it does seem as if this was mostly a joy to work on.
Changing camera positions are used well to give it some nice variety. I specially liked the close-up before more players were inctoduced and the part which showed them playing all in a line.
The ending is brilliant, with more variations in exiting than is possible to appreciate in one sitting. The lone figure was a humorous touch, with - again - excellent animation. The great ending does well to leave us with a favourable view.
It's a great idea, but it could have been so tiring due to the lack of interaction usually part of such percussive experiences and the simplicity of the elementary concept.
However, thanks to your animation, your variations in 'camera angles' and the well refined organisation of the percussion, it remains visually interesting.
Other than the aforementioned sudden disappearance of the credit, I really have no complaints.