Tower defence: the canyon

The forces of Darkness have bursted in our world. They walk along the land destroying the kingdoms one by one. Not long ago we have received the report from our scouts that Evil has reached our borders. But we can stop it! The way of the evil forces passes through a narrow canyon that is perfectly adapted for our ambush...

Instructions
Classic tower defence. You must build and upgrade towers to defeat waves of creeps. Big tutorial inside the game is present.