I generally don't buy from iTunes (have a Rhapsody subscription) but broke down for this game. Yes, Skrillex is pretty insane. More mainstream but also got Breathe Carolina's Blackout and it's pretty awesome with BHU too. Wish my Rhapsody sub would work with it.
I just played Necrofantasia from Touhou Project 7: Perfect Cherry Blossom. Not extremely hard, but I got 18.2 mil, suicidal, no gold ship, and not all of the score perks... https://www.youtube.com/watch?v=2vjZ1SPAH6g