Anything creative or requiring creative thought, in all subject areas, including games, is in my opinion artistic in nature. Creativity/invention = art.
I don't think a painting/statue is any more artistic than someone coming up with the idea for the toothbrush/wheel, just because one is deemed "useful/practical" and the other is not. If one wants to try to differentiate between emotional art ("art") and the functional art ("invention"), cool, but y'know....I'm rather attached to the toothbrush and get pretty emotionally unhappy without it. :D