Just read the book or watch the movie...
played for an hour or so, it has nothing exciting to offer other than unlocking some pictures at each adventure. so far i have gone to collecting letters like "SOME PIG" and "TER" which constitues till adventure #6.
the spider friend from wilbur is basically providing hints when the pig-hero wanders from barn to forest to start his gathering. he even helps the goose to hatch its eggs! really SOME PIG!
on the whole, i would say that you can just rent it if you want to have some good bonding with the piglet. :P