1 Penguins follow the player as best they can. If they are next to an open exit,
2 they will leave the level. All the penguins *must* exit before the player
3 exits, or the player will not win the level. If a penguin is smashed, it'll
4 produce one purple gem, but the level will then be unsolvable. Penguins can
5 collect gems for the player.