A pickup is a GameObject that has a box collider attached to it. When the box collider is touched by Rigidbody, we will run code to check what touched it. If what touched it is the player character, we will give the player character a point of what type of pickup it is and then destroy the pickup so that it cannot be touched again. Also, if the pickup is a coin, we will tell the player character that it collected a coin by taking the value of coins the player currently has and add one to it.