Not bad.
Something else that bugs me is the cruddy graphics. I know it is a PS game, but look at Spyro and Crash. They could definitely be a lot better.
It is fun, but not long enough. You'll get maybe 7 hours out of it, if you just fool around. Finding animals is buggy, because they can run away and you can't go where they are. Not bad, but not good either.