Add project files.

AlientAttack.MonoGame/Things/Items/Energy.cs

@@ -0,0 +1,14 @@
+namespace AlienAttack.MonoGame.Things.Items;
+
+internal class Energy : Item
+{
+    public Energy(int x, int y) : base(x, y)
+    {
+        TextureName = @$"Sprites\Powerup_Energy";
+    }
+
+    protected override void ApplyEffect(Player player)
+    {
+        
+    }
+}