Defeating the enemies is not enough. We need a solid goal to fight for. We will create this in the form of a base at the end of the road. The enemies will try to reach the base, decreasing its health with each enemy that enters it. The player must try to stop the enemies before they reach the base.
We will draw the base with some face-like features. Things that look human help the player to empathize more with them. The following are the steps to create a base: