void Start()
{
Camera camera = GetComponent <Camera>();
float halfCamHeight = camera.orthographicSize;
float halfCamWidth = camera.orthographicSize * camera.aspect;
float offset = 0.5f;
float verticalOffset = 4f;
leftBound = halfCamWidth - mapBuffer - offset;
rightBound = Crates.Width() + mapBuffer - offset - halfCamWidth;
lowerBound = halfCamHeight - mapBuffer - offset - verticalOffset;
upperBound = Crates.Height() + mapBuffer - offset - halfCamHeight;
SnapToBoundaries();
}