Dottie, I did come across
this, recently. I don't know if that meets your criteria, but it does come rather closer to the "computer gaming as art" than anything else I've seen to date. To quote from the designer of this very short game:
Passage is meant to be a memento mori game. It presents an entire life, from young adulthood through old age and death, in the span of five minutes. Of course, it's a game, not a painting or a film, so the choices that you make as the player are crucial. There's no "right" way to play Passage, just as there's no right way to interpret it. However, I had specific intentions for the various mechanics and features that I included. You've probably figured most of these out already, but I wanted to put forth a few explanations for anyone who is interested.
It's in the selection of mechanics that the thought, and possibly the art, lies. If art can be qualified.