Art can be many things. The term itself is subjective which is why we're actually having a debate as to whether or not a game is art. There are definitely art components to a game, but the end result typically is not. Can a game be art, absolutely. Art is a form of communication with an express purpose to cause a some specific reaction in the viewer to to help us realize something about ourselves or whatever else the artist is trying to convey.
A game can defintely be beautiful, with many "art" components, but I would call it art with a "little a" because the game is commercial and meant to be a product rather than a message. Games come very close to being art at times, but until such time as they are intended from the start to be "Art" where the success of a piece can be determined in accomplishing something beyond what it is as a physical product.
In counterpoint I look at something like a Michelangelo sculpture, what differentiates that from some mass produced statue in a store? To that I would say that the artist was trying to capture his vision and create it in a physical form.. in which case a game could definitely be considered "Art"...
So is a game art.. i guess the only answer can be.. "If it was intended to be" .. at which point one can weight whether or not it was successful art.