Hiro's been around the Metaverse long enough to know that despite the bright cheery appearance of this thing, it is, in fact, as simple and utilitarian as an Army camp. This is a model of a system. A big complicated system. The shapes probably represent computers, or central nodes in Rife's worldwide network, or Pearly Gates franchises, or any other kind of local and regional offices that Rife has going around the world. By clambering over this structure and going into those bright shapes, Hiro could probably uncover some of the code that makes Rife's network operate. He could, perhaps, try to hack it up, as Juanita suggested.