Time for action – accounting for walls

1. Add the checkTileObstacles() method to the Movement Limitations region of the Player class:

   private static Vector2 checkTileObstacles(
       float elapsedTime, 
       Vector2 moveAngle)
   {
       Vector2 newHorizontalLocation = BaseSprite.WorldLocation +
           (new Vector2(moveAngle.X, 0) * (playerSpeed * elapsedTime));
   
       Vector2 newVerticalLocation = BaseSprite.WorldLocation +
           (new Vector2(0, moveAngle.Y) * (playerSpeed * elapsedTime));
   
       Rectangle newHorizontalRect = new Rectangle(
           (int)newHorizontalLocation.X,
           (int)BaseSprite.WorldLocation.Y,
           BaseSprite.FrameWidth,
           BaseSprite.FrameHeight);
   
       Rectangle newVerticalRect = new Rectangle(
           (int)BaseSprite.WorldLocation.X,
           (int)newVerticalLocation.Y,
           BaseSprite.FrameWidth,
           BaseSprite.FrameHeight);
   
       int horizLeftPixel = 0;
       int horizRightPixel = 0;
   
       int vertTopPixel = 0;
       int vertBottomPixel = 0;
   
       if (moveAngle.X...