Another kind of basket

If the wall-type baskets are too hard to get a ball into, make a new kind of Basket class which overrides its collide method to use a contains(pcritter) call so as to only report a collision when the pcritter is entirely inside it. So as to let this Basket control the collisions, give it a higher _collidepriority than the puck or ball. Test to see which kind of basket makes for better game play, that is, play poised at the interesting border between too easy and too hard.