I'm afraid I can't. In very general terms, I just remember the feeling that I got several times was similar to that of discovering that something that I had thought was a scalar quantity was in fact a vector. Un-thought-of dimensions just seemed to keep popping up.

Our bafflement was probably enhanced by not noticing the "Learn to Play" booklet initially. Then each of us trying to read a separate booklet, and disagreeing with the others about how to proceed, etc.