Hello, I am writing a 2D augmented reality game for now maybe I will make it 3D soon,but I want to experiment on 2D first.
So I am new with writing games so my question is what is the principle of creating enemy attacking at some coordinates.

Lets say that my user is now on Level.50 , how am I suppose to create 50 enemies attack at x,y coordinates with code,and how to make that when I click on them to destroy them ?
The only idea that comes to my mind is to create a class Enemy and then to write the logic in it, and when the level increase the objects in the class enemy will also increase,but what the logic will be to attack at x,y coordinates and destroy each enemy just by click on them,and how to show then on screen (please don't say picturebox)