In addition to this will be the momentum bar! This adds a third level to the RPS mechanic. The momentum bar is like a mulligan. However, instead of a free stroke it reduces the reaction time on the skill game. For example, if you have 0.3 seconds built up in the momentum bar, whatever your reaction time is, it is reduced by up to 0.3 seconds until it's 0.0 seconds.
What this does, I hope, is that you may just choose to play "Block" the entire match because you're just that much better at the skill game than your opponent. But if you keep playing the same move, your momentum bar never grows and may actually decrease. Your opponent's will also grow, making it easier for them to land a successful attack even if, physically, you were able to beat them on the skill game.