The rhythm in Revolution has this weird chord-to-HO-to-PO structure that looks ridiculous. I can't make my fingers move that way when I try to play along to the trailer, but sometimes it's easier once you're actually playing the game.
And I agree -- despite what many say, some of these songs look freakin' hard. I think HMX did a good job of trying to please everyone from those who want to be able to finish the game out of enjoyment to those who crave challenge. Props to you, HMX!