Whenever I play Broked It by SWiTCH on pro mode, i can never get a perfect because of the very end part where you hit the left and right keys at the same time like 8 times. My keyboard isn't responding fast enough or something.
When you play this game, the key is to find the room with the lowest amount of people in it, because chances are good that no one will be chatting, leaving no lag to be complained about :)