Earth humans do smoke miasma of pollution, pest infestation will have arrived at the shelter a human! Save the world falls on the body of a little frog. Control of small frogs eat all the insects to cross the border, in particular, small frogs can spit out a long tongue, either drag the body forward, you can drag the object to move, of course, is also a small frog can jump. Engine makes use of physical structures is not the only way to cross the border, but the game screen is quite good, very pleasant to the eye.