Tower of Power and Symphony No.1 already speed up with difficulty. I’ve added the same to Binary Stream/Scream in v.145 
Bug
Technically, the server doesn’t know what type of mission dares/cup are. So it just uses that icon instead.
The music is taken from the “left side” video. If that player has overridden music, then that’s what you’ll hear. But I can change that in v.145. Idea
Ooh… right. 
I’ll look into it.