The earliest games did not have backglasses or backboxes and ended up little much more than playfields in packing containers. Games are typically created close to a certain topic, such as a Activity or character as well as backglass art reflects this concept to bring in the eye of players. https://open.substack.com/pub/pinballcop/p/stern-pinball-machines-a-comprehensive?r=3ltf5y&utm_campaign=post&utm_medium=web&showWelcomeOnShare=true