if(cursor.primaryPush)
{
    foreach(Sprite sprite in mySpriteArray)
    {
        if(cursor.IsOn(sprite))
        {
            // Success!
            cursor.spriteGrabbed = sprite;
            cursor.SetRelativeSpritePosition(sprite);
        }
    }
}

if(cursor.primaryDown && cursor.spriteGrabbed != null)
{
    cursor.UpdateSpriteGrabbedPosition();
}

if(cursor.primaryClick)
{
    cursor.spriteGrabbed = null;
}