It is a work of C gaming.
Yes some may say it is art but it is not a painting nor are there famous pinball machines around the world in museums.
Yes it was a sort of miracle when it was made as there were no technological advancements at the time, but it is not a science.
No it is not none of the above as it is a work of gaming.
Pinball machines were made for entertainment and playing the games.
Hope i helped!