-The BD style amoeba has some special properties: When it is completely
-surrounded by boulders, it turns to diamonds. But if this cannot be
-achieved in a certain amount of time, this amoeba turns to boulders
-instead.
+The BD style Amoeba grows randomly through empty space and sand.
+When it is enclosed, it stops growing and transforms into diamonds (or
+some other, configurable game element).
+
+When it has grown too big, it suddenly transforms into rocks. At the beginning,
+it can grow slowly, but after some time it starts growing very rapidly.