In this section, we will learn how to create the enemies for our Tower Defense game.
Since we will see how the game manager will spawn a lot of enemies later, in Chapter 9, Finishing the Game, we need to create a prefab to store all the data for one enemy, including its graphics, components, and scripts.
By right-clicking on the Hierarchy panel, we can select 2D Object/Sprite in order to create a new Sprite. Of course, we need to assign the graphic and adjust its dimensions to fit our game environment. In this case, we can chose the slime_red as our enemy. Like the previous components, towers and bullets, it also needs to be scaled. In this case, we can set the whole scale vector to 0.8. Furthermore, we should set the value of the Z-axis, for the position, to -1. Once we have done this, it should look like this:
In order to be detected by the towers, our enemy should have the enemy tag. Since we have already created this tag in the bullet section, it can easily...