Updated enemies. Added boost.

AlientAttack.MonoGame/Things/Player.cs

@@ -21,7 +21,8 @@ internal enum MoveFlag
     Left = 1,
     Right = 2,
     Up = 4,
-    Down = 8
+    Down = 8,
+    Boost = 16
 }
 
 public class DrwaState
@@ -184,6 +185,11 @@ internal class Player : MoveableSprite
             MoveThreshold = 0;
         }
 
+        if (MoveFlags.HasFlag(MoveFlag.Boost))
+        {
+            XVelocity *= 1.5f;
+        }
+
         if (XPosition < 0)
         {
             XPosition = 0;
@@ -229,6 +235,11 @@ internal class Player : MoveableSprite
         {
             MoveFlags |= MoveFlag.Right;
         }
+
+        if (gamepadState.Buttons.RightShoulder == ButtonState.Pressed)
+        {
+            MoveFlags |= MoveFlag.Boost;
+        }
     }
 
     private void CheckFire(SpriteUpdateContext context)