Eternal Ice

Help the brave penguin to build a safe fortress in the middle of the eternal ices. Its flock needs a secure shelter in case the cold is severe or they are in danger. Penguins` problems are the same as ours - careless workers. From time to time you don`t get the lump you need. But still you have to build a refuge that neither bad frost nor any attack can damage. Mind that the neighbour penguin flock is very aggressive! Besides, the shelter must house all the penguins of the flock, including old ones and kids. Make sure it`s large enough!