Can some explain to me the following

Jose,

I remember having to pause the video so I could let this soak in, too! Prior to this video you should have created a 'Level' class that takes in an array of invaders as a parameter. What I've pasted in is the code that shows the creation of the invaders array, the creation of the towers array, and then the creation of your level in the 'Game.cs'.

Even though your level class has a 'Towers' field, it isn't required to create the level object. What Jeremy is doing is creating the level object with the invaders array AND also assigning the towers array to the Towers field of the level object. Hope this clarifies some things!

Here is a link to the video: (https://teamtreehouse.com/library/playing-the-game)

Snippet from 'Game.cs':

                Invader[] invaders = 
                {
                    new ShieldedInvader(path),
                    new FastInvader(path),
                    new StrongInvader(path),
                    new Invader(path)
                };

                Tower[] towers =
                {
                    new SniperTower(new MapLocation(1, 3, map)),
                    new PowerfulTower(new MapLocation(3, 3, map)),
                    new LongRangeTower(new MapLocation(5, 3, map))
                };

                Level level1 = new Level(invaders)
                {
                    Towers = towers
                };