Animals in skewer

In the game, there are 7 kinds of animals (mouse,cat,dog,wolf,leopard, tiger, lion, elephant), shotgun and lightning.Rules:cat eat mouse,dog eat cat,wolf eat dog,leopard eat wolf,tiger eat leopard,lion eat tiger,elephant eat lion,mouse eat elephant.Two adjacent animals in skewer,the animals were eating will disappear,and access points.When shotgun in skewer, all the animals in skewer disappear,and add points.Lightning rods will eliminate the use of the first animal in skewers,and less points.Features:
1.The dialectic of elimination and retention.
2.Unlimited number of levels,as long as your level enough of.
3.Both leisure and puzzle.

video:
http://v.youku.com/v_show/id_XMjM0OTUwMzQ4.html