Continuing on from play this thing
I think he's right, it's not art. A finely crafted chess set might be art as an object, but that doesn't make the game itself art. Nor does a bunch of arty stuff in a video game make it rise above being a game. It's just a crappy game with a bunch of art tacked on, in this case.
Now, can you make art by playing a game? Yes, yes you can. But that still doesn't make the game become art itself. A paintbrush can make art - that doesn't mean a painbrush IS art itself.
It's actually quite annoying to see people create art with a game in their own heads, then attribute what they created as being part of the actual game/activity. It attributes too much to the game and does not give credit to their own creativity. Table top roleplay suffers from this extensively.