The problem with art is that we tend to use it as a synonym for good or beautiful, when it does't have to be the case. So, if someone says that something isn't art, we usually interpret that the thing in question is not "good enough" to be considered art.
As I see it, art is a combination of artisany and philosophy: creating something (a movie, a painting, a video game...) and giving it a discourse. The Red Blue Chair, for instance, is probably one of the most uncomfortable chairs ever made. However, it wasn't made for sitting, but to make a statement. It doesn't make it better or worse than any other chair, just different. Food, for example, will not be art despite being delicious as long as it doesn't have a discourse. And that is not a bad thing.
If we're talking about videogames, Tetris is not art, while Detroit Become Human is, and I think we can all agree that the first one is way better than the latter. And, perhaps, if Tetris tried to have some sort of 'message', it would be for the worse. So, as a game, it's better off by not trying to be art.