To get past most of the urchins you can stand in one place and click towards the urchin until it jumps at you. That usually works. I don' t exactly know what you mean my pick up the claws, but if you're referring the the claw that hovers above the floor then you can't. Those are just my attempts at creating a text-less tutorial. What it is supposed to mean is "click to move your claws" and "hit urchins with your claws to kill them". I hope this helps, sorry I got back to you so late.