From the album Launch.
Shurk was previously spelled Shirk, hence the name on the album cover.
Update 04/11/21: removed some bad short spins in XD, XD 45 -> 39
Update 15/11/21: big thanks to Ballin, PickPig, swagdude, and Programmatic for feedback. Fixed a few random mistimed notes on many difficulties. Fixed some XD movements. Completely revisited the rhythm in both buildups and drops (not quite triplets!)
:Mesopotamia:
Update 11/12/21: Minor SSSO feedback. Double checked all timings.