Really good stuff. Understanding what it is, I have to say it's quite nice. Really good sense of rhythm. If I could touch anything, it would be that the symbols seem to clash a tad. I think it's because they are too present. I can't fault anything for this, as this is just a demonstration anyway. Maybe the only thing I could suggest is to have them happen less often, but I could just be showing my own personal tastes here.
Nice stuff.