I remember when me and my brother loved Super Mario World so much that we used graph paper and designed many of our own Super Mario World-esque platformer stages. I wonder where all those are, and what kind of memories they would invoke if I tried to "play" through them...
Between that, Mega Man Solid X: Guns Of The Mavericks, and The Legend Of Zelda: Oracle Of Hours (even though that's not a platformer), I certainly did have certain things in mind when I designed game areas. I never thought of them as rhythm groups, though looking back on it, I did design areas and rooms with particular themes/challenges/obstacles in mind, so I suppose I was aware of the notion of "rhythm groups", even if I never thought to put a name to that concept.
It would be interesting if this paper was for a class where other people wrote about other genres of games. It would be neat to see if they use the same fancy terms for concepts like "rhythm groups" in, say, FPSes, RTSes, or RPGs.