If you are interested, here are three out of six of the ideas for new
classes that received bonus marks.

One of Arman Alfonso's creations  is a Wanderer.  A  Wanderer is a black
mouse that locates dead Herbivores and delivers a flower to the place of
their death.   When  a  Herbivore dies,   its location is  stored  in  a
modified  queue, and as  the flower is  delivered  (which is marked by a
maple leaf symbol on the screen just  beside the place), the location is
dequeued.

Sunny  Choi has come   up with a  new  terrain  called Sanctuary.  In  a
Sanctuary,   no animal can   kill another.  If  it makes  an attempt, an
invisible guardian will kill it instead.

Alan  Ng has created  a special kind of mouse  that periodically lays an
egg.    When  an egg-laying mouse     (EggMouse) has reached its  random
destination, it decides  whether   to lay an   egg  by flipping  a  coin
("randint").  Once an egg is laid, it is added to  the world by creating
an object of another new class, Egg.  In  a few iterations, an Egg takes
its turn and hatches.  A new  EggMouse is thus  released into the world,
while the Egg itself disappears.